diff --git a/doc/releases/release-notes-4.0.rst b/doc/releases/release-notes-4.0.rst
index b4a8e7a93789fe..66ef9904ad28aa 100644
--- a/doc/releases/release-notes-4.0.rst
+++ b/doc/releases/release-notes-4.0.rst
@@ -27,6 +27,9 @@ API Changes
 Removed APIs in this release
 ============================
 
+* Macro ``K_THREAD_STACK_MEMBER``, deprecated since v3.5.0, has been removed.
+  Use :c:macro:`K_KERNEL_STACK_MEMBER` instead.
+
 Deprecated in this release
 ==========================
 
diff --git a/include/zephyr/kernel/thread_stack.h b/include/zephyr/kernel/thread_stack.h
index a8151cce9d14ba..2989624e043672 100644
--- a/include/zephyr/kernel/thread_stack.h
+++ b/include/zephyr/kernel/thread_stack.h
@@ -293,7 +293,6 @@ static inline char *K_KERNEL_STACK_BUFFER(k_thread_stack_t *sym)
 #define K_THREAD_STACK_LEN		K_KERNEL_STACK_LEN
 #define K_THREAD_STACK_DEFINE		K_KERNEL_STACK_DEFINE
 #define K_THREAD_STACK_ARRAY_DEFINE	K_KERNEL_STACK_ARRAY_DEFINE
-#define K_THREAD_STACK_MEMBER		K_KERNEL_STACK_MEMBER
 #define K_THREAD_STACK_BUFFER		K_KERNEL_STACK_BUFFER
 #define K_THREAD_STACK_DECLARE		K_KERNEL_STACK_DECLARE
 #define K_THREAD_STACK_ARRAY_DECLARE	K_KERNEL_STACK_ARRAY_DECLARE
@@ -613,27 +612,6 @@ static inline char *K_KERNEL_STACK_BUFFER(k_thread_stack_t *sym)
 	K_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size)
 #endif /* CONFIG_LINKER_USE_PINNED_SECTION */
 
-/**
- * @brief Define an embedded stack memory region
- *
- * Used for stacks embedded within other data structures. Use is highly
- * discouraged but in some cases necessary. For memory protection scenarios,
- * it is very important that any RAM preceding this member not be writable
- * by threads else a stack overflow will lead to silent corruption. In other
- * words, the containing data structure should live in RAM owned by the kernel.
- *
- * A user thread can only be started with a stack defined in this way if
- * the thread starting it is in supervisor mode.
- *
- * @deprecated This is now deprecated, as stacks defined in this way are not
- *             usable from user mode. Use K_KERNEL_STACK_MEMBER.
- *
- * @param sym Thread stack symbol name
- * @param size Size of the stack memory region
- */
-#define K_THREAD_STACK_MEMBER(sym, size) __DEPRECATED_MACRO \
-	Z_THREAD_STACK_DEFINE_IN(sym, size,)
-
 /** @} */
 
 /**