diff --git a/CHANGELOG.md b/CHANGELOG.md
index 56e8b3d3..e970f3b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Fixes
+
+- fix: beforeBreadcrumb discarding breadcrumbs on Apple platforms ([#101](https://github.com/getsentry/sentry-kotlin-multiplatform/pull/101))
+
 ## 0.2.0
 
 ### Features
diff --git a/sentry-kotlin-multiplatform/src/commonAppleMain/kotlin/io/sentry/kotlin/multiplatform/extensions/SentryOptionsExtensions.kt b/sentry-kotlin-multiplatform/src/commonAppleMain/kotlin/io/sentry/kotlin/multiplatform/extensions/SentryOptionsExtensions.kt
index 973de837..5d73d6cd 100644
--- a/sentry-kotlin-multiplatform/src/commonAppleMain/kotlin/io/sentry/kotlin/multiplatform/extensions/SentryOptionsExtensions.kt
+++ b/sentry-kotlin-multiplatform/src/commonAppleMain/kotlin/io/sentry/kotlin/multiplatform/extensions/SentryOptionsExtensions.kt
@@ -67,8 +67,12 @@ internal fun CocoaSentryOptions.applyCocoaBaseOptions(options: SentryOptions) {
     PrivateSentrySDKOnly.setSdkName(sdkName, sdkVersion)
 
     beforeBreadcrumb = { cocoaBreadcrumb ->
-        cocoaBreadcrumb?.toKmpBreadcrumb()
-            ?.let { options.beforeBreadcrumb?.invoke(it) }?.toCocoaBreadcrumb()
+        if (options.beforeBreadcrumb == null) {
+            cocoaBreadcrumb
+        } else {
+            cocoaBreadcrumb?.toKmpBreadcrumb()
+                ?.let { options.beforeBreadcrumb?.invoke(it) }?.toCocoaBreadcrumb()
+        }
     }
 
     enableCaptureFailedRequests = options.enableCaptureFailedRequests
diff --git a/sentry-kotlin-multiplatform/src/commonAppleTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt b/sentry-kotlin-multiplatform/src/commonAppleTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt
new file mode 100644
index 00000000..944d7514
--- /dev/null
+++ b/sentry-kotlin-multiplatform/src/commonAppleTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt
@@ -0,0 +1,23 @@
+package io.sentry.kotlin.multiplatform
+
+import io.sentry.kotlin.multiplatform.extensions.applyCocoaBaseOptions
+import io.sentry.kotlin.multiplatform.extensions.toKmpBreadcrumb
+import io.sentry.kotlin.multiplatform.protocol.Breadcrumb
+
+actual class BreadcrumbConfigurator {
+    private val cocoaBreadcrumb = CocoaBreadcrumb()
+    actual val originalBreadcrumb: Breadcrumb = cocoaBreadcrumb.toKmpBreadcrumb()
+
+    actual fun applyOptions(optionsConfiguration: OptionsConfiguration): Breadcrumb? {
+        val kmpOptions = SentryOptions()
+        optionsConfiguration.invoke(kmpOptions)
+        return applyOptions(kmpOptions)
+    }
+
+    actual fun applyOptions(options: SentryOptions): Breadcrumb? {
+        val cocoaOptions = CocoaSentryOptions()
+        cocoaOptions.applyCocoaBaseOptions(options)
+        val cocoaModifiedBreadcrumb = cocoaOptions.beforeBreadcrumb?.invoke(cocoaBreadcrumb)
+        return cocoaModifiedBreadcrumb?.toKmpBreadcrumb()
+    }
+}
diff --git a/sentry-kotlin-multiplatform/src/commonJvmMain/kotlin/io/sentry/kotlin/multiplatform/extensions/SentryOptionsExtensions.kt b/sentry-kotlin-multiplatform/src/commonJvmMain/kotlin/io/sentry/kotlin/multiplatform/extensions/SentryOptionsExtensions.kt
index f793dda9..8b6ef6ed 100644
--- a/sentry-kotlin-multiplatform/src/commonJvmMain/kotlin/io/sentry/kotlin/multiplatform/extensions/SentryOptionsExtensions.kt
+++ b/sentry-kotlin-multiplatform/src/commonJvmMain/kotlin/io/sentry/kotlin/multiplatform/extensions/SentryOptionsExtensions.kt
@@ -41,7 +41,11 @@ internal fun JvmSentryOptions.applyJvmBaseOptions(options: SentryOptions) {
     maxAttachmentSize = options.maxAttachmentSize
     maxBreadcrumbs = options.maxBreadcrumbs
     setBeforeBreadcrumb { jvmBreadcrumb, _ ->
-        options.beforeBreadcrumb?.invoke(jvmBreadcrumb.toKmpBreadcrumb())?.toJvmBreadcrumb()
+        if (options.beforeBreadcrumb == null) {
+            jvmBreadcrumb
+        } else {
+            options.beforeBreadcrumb?.invoke(jvmBreadcrumb.toKmpBreadcrumb())?.toJvmBreadcrumb()
+        }
     }
     setBeforeSend { jvmSentryEvent, hint ->
         if (options.beforeSend == null) {
diff --git a/sentry-kotlin-multiplatform/src/commonJvmTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt b/sentry-kotlin-multiplatform/src/commonJvmTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt
new file mode 100644
index 00000000..1d4912b5
--- /dev/null
+++ b/sentry-kotlin-multiplatform/src/commonJvmTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt
@@ -0,0 +1,25 @@
+package io.sentry.kotlin.multiplatform
+
+import io.sentry.Hint
+import io.sentry.kotlin.multiplatform.extensions.applyJvmBaseOptions
+import io.sentry.kotlin.multiplatform.extensions.toKmpBreadcrumb
+import io.sentry.kotlin.multiplatform.protocol.Breadcrumb
+
+actual class BreadcrumbConfigurator {
+    private val jvmBreadcrumb = JvmBreadcrumb()
+    actual val originalBreadcrumb: Breadcrumb = jvmBreadcrumb.toKmpBreadcrumb()
+
+    actual fun applyOptions(optionsConfiguration: OptionsConfiguration): Breadcrumb? {
+        val kmpOptions = SentryOptions()
+        optionsConfiguration.invoke(kmpOptions)
+        return applyOptions(kmpOptions)
+    }
+
+    actual fun applyOptions(options: SentryOptions): Breadcrumb? {
+        val jvmOptions = JvmSentryOptions()
+        jvmOptions.applyJvmBaseOptions(options)
+        val jvmHint = Hint()
+        val jvmModifiedBreadcrumb = jvmOptions.beforeBreadcrumb?.execute(jvmBreadcrumb, jvmHint)
+        return jvmModifiedBreadcrumb?.toKmpBreadcrumb()
+    }
+}
diff --git a/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BeforeBreadcrumbIntegrationTest.kt b/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BeforeBreadcrumbIntegrationTest.kt
new file mode 100644
index 00000000..27fe6165
--- /dev/null
+++ b/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BeforeBreadcrumbIntegrationTest.kt
@@ -0,0 +1,137 @@
+package io.sentry.kotlin.multiplatform
+
+import io.sentry.kotlin.multiplatform.utils.fakeDsn
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+
+class BeforeBreadcrumbIntegrationTest {
+    private val breadcrumbConfigurator = BreadcrumbConfigurator()
+
+    @Test
+    fun `breadcrumb is not null if KMP beforeBreadcrumb callback config is null`() {
+        val breadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+        }
+        assertNotNull(breadcrumb)
+    }
+
+    @Test
+    fun `breadcrumb is null if KMP beforeBreadcrumb callback config returns null`() {
+        val breadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = {
+                null
+            }
+        }
+        assertNull(breadcrumb)
+    }
+
+    @Test
+    fun `breadcrumb is not null if KMP beforeBreadcrumb callback config returns not null`() {
+        val breadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb
+            }
+        }
+        assertNotNull(breadcrumb)
+    }
+
+    @Test
+    fun `breadcrumb level is not modified if KMP beforeBreadcrumb callback config does not modify it`() {
+        val originalBreadcrumb = breadcrumbConfigurator.originalBreadcrumb
+        val modifiedBreadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb
+            }
+        }
+        assertEquals(originalBreadcrumb.level, modifiedBreadcrumb?.level)
+    }
+
+    @Test
+    fun `breadcrumb level is modified if KMP beforeBreadcrumb callback config modifies it`() {
+        val modifiedBreadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb.level = SentryLevel.WARNING
+                breadcrumb
+            }
+        }
+        assertEquals(SentryLevel.WARNING, modifiedBreadcrumb?.level)
+    }
+
+    @Test
+    fun `breadcrumb category is not modified if KMP beforeBreadcrumb callback config does not modify it`() {
+        val originalBreadcrumb = breadcrumbConfigurator.originalBreadcrumb
+        val modifiedBreadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb
+            }
+        }
+        assertEquals(originalBreadcrumb.category, modifiedBreadcrumb?.category)
+    }
+
+    @Test
+    fun `breadcrumb category is modified if KMP beforeBreadcrumb callback config modifies it`() {
+        val modifiedBreadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb.category = "category"
+                breadcrumb
+            }
+        }
+        assertEquals("category", modifiedBreadcrumb?.category)
+    }
+
+    @Test
+    fun `breadcrumb type is not modified if KMP beforeBreadcrumb callback config does not modify it`() {
+        val originalBreadcrumb = breadcrumbConfigurator.originalBreadcrumb
+        val modifiedBreadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb
+            }
+        }
+        assertEquals(originalBreadcrumb.type, modifiedBreadcrumb?.type)
+    }
+
+    @Test
+    fun `breadcrumb type is modified if KMP beforeBreadcrumb callback config modifies it`() {
+        val modifiedBreadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb.type = "type"
+                breadcrumb
+            }
+        }
+        assertEquals("type", modifiedBreadcrumb?.type)
+    }
+
+    @Test
+    fun `breadcrumb message is not modified if KMP beforeBreadcrumb callback config does not modify it`() {
+        val originalBreadcrumb = breadcrumbConfigurator.originalBreadcrumb
+        val modifiedBreadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb
+            }
+        }
+        assertEquals(originalBreadcrumb.level, modifiedBreadcrumb?.level)
+    }
+
+    @Test
+    fun `breadcrumb message is modified if KMP beforeBreadcrumb callback config modifies it`() {
+        val modifiedBreadcrumb = breadcrumbConfigurator.applyOptions {
+            it.dsn = fakeDsn
+            it.beforeBreadcrumb = { breadcrumb ->
+                breadcrumb.message = "message"
+                breadcrumb
+            }
+        }
+        assertEquals("message", modifiedBreadcrumb?.message)
+    }
+}
diff --git a/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BeforeBreadcrumbTest.kt b/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BeforeBreadcrumbTest.kt
new file mode 100644
index 00000000..aad7f79a
--- /dev/null
+++ b/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BeforeBreadcrumbTest.kt
@@ -0,0 +1,19 @@
+package io.sentry.kotlin.multiplatform
+
+import io.sentry.kotlin.multiplatform.protocol.Breadcrumb
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class BeforeBreadcrumbTest {
+    @Test
+    fun `beforeBreadcrumb drops breadcrumb`() {
+        val options = SentryOptions()
+        options.beforeBreadcrumb = {
+            null
+        }
+
+        val breadcrumb = options.beforeBreadcrumb?.invoke(Breadcrumb())
+
+        assertEquals(null, breadcrumb)
+    }
+}
diff --git a/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt b/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt
new file mode 100644
index 00000000..4dcda258
--- /dev/null
+++ b/sentry-kotlin-multiplatform/src/commonTest/kotlin/io/sentry/kotlin/multiplatform/BreadcrumbConfigurator.kt
@@ -0,0 +1,13 @@
+package io.sentry.kotlin.multiplatform
+
+import io.sentry.kotlin.multiplatform.protocol.Breadcrumb
+
+/**
+ * This class deals with configuring and modifying a Breadcrumb.
+ * It is used to test any code that can alter a Breadcrumb.
+ */
+expect class BreadcrumbConfigurator() {
+    val originalBreadcrumb: Breadcrumb
+    fun applyOptions(optionsConfiguration: OptionsConfiguration): Breadcrumb?
+    fun applyOptions(options: SentryOptions = SentryOptions()): Breadcrumb?
+}