diff --git a/discord/raw_models.py b/discord/raw_models.py
index 35295a633..bca0721aa 100644
--- a/discord/raw_models.py
+++ b/discord/raw_models.py
@@ -42,6 +42,7 @@ if TYPE_CHECKING:
         IntegrationDeleteEvent,
         ThreadUpdateEvent,
         ThreadDeleteEvent,
+        ThreadMembersUpdate,
         TypingStartEvent,
         GuildMemberRemoveEvent,
     )
@@ -64,6 +65,7 @@ __all__ = (
     'RawIntegrationDeleteEvent',
     'RawThreadUpdateEvent',
     'RawThreadDeleteEvent',
+    'RawThreadMembersUpdate',
     'RawTypingEvent',
     'RawMemberRemoveEvent',
 )
@@ -357,6 +359,32 @@ class RawThreadDeleteEvent(_RawReprMixin):
         self.thread: Optional[Thread] = None
 
 
+class RawThreadMembersUpdate(_RawReprMixin):
+    """Represents the payload for a :func:`on_raw_thread_member_remove` event.
+
+    .. versionadded:: 2.0
+
+    Attributes
+    ----------
+    thread_id: :class:`int`
+        The ID of the thread that was updated.
+    guild_id: :class:`int`
+        The ID of the guild the thread is in.
+    member_count: :class:`int`
+        The approximate number of members in the thread. This caps at 50.
+    data: :class:`dict`
+        The raw data given by the :ddocs:`gateway <topics/gateway#thread-members-update>`.
+    """
+
+    __slots__ = ('thread_id', 'guild_id', 'member_count', 'data')
+
+    def __init__(self, data: ThreadMembersUpdate) -> None:
+        self.thread_id: int = int(data['id'])
+        self.guild_id: int = int(data['guild_id'])
+        self.member_count: int = int(data['member_count'])
+        self.data: ThreadMembersUpdate = data
+
+
 class RawTypingEvent(_RawReprMixin):
     """Represents the payload for a :func:`on_raw_typing` event.
 
diff --git a/discord/state.py b/discord/state.py
index 7b05e1a51..19a4c6843 100644
--- a/discord/state.py
+++ b/discord/state.py
@@ -965,6 +965,7 @@ class ConnectionState:
 
         thread_id = int(data['id'])
         thread: Optional[Thread] = guild.get_thread(thread_id)
+        raw = RawThreadMembersUpdate(data)
         if thread is None:
             _log.debug('THREAD_MEMBERS_UPDATE referencing an unknown thread ID: %s. Discarding', thread_id)
             return
@@ -983,6 +984,7 @@ class ConnectionState:
         for member_id in removed_member_ids:
             if member_id != self_id:
                 member = thread._pop_member(member_id)
+                self.dispatch('raw_thread_member_remove', raw)
                 if member is not None:
                     self.dispatch('thread_member_remove', member)
             else:
diff --git a/docs/api.rst b/docs/api.rst
index e07d87dda..f0c656259 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -1266,6 +1266,18 @@ Threads
     :param member: The member who joined or left.
     :type member: :class:`ThreadMember`
 
+.. function:: on_raw_thread_member_remove(payload)
+
+    Called when a :class:`ThreadMember` leaves a :class:`Thread`. Unlike :func:`on_thread_member_remove` this
+    is called regardless of the member being in the internal thread's members cache or not.
+
+    This requires :attr:`Intents.members` to be enabled.
+
+    .. versionadded:: 2.0
+
+    :param payload: The raw event payload data.
+    :type member: :class:`RawThreadMembersUpdate`
+
 Voice
 ~~~~~~
 
@@ -4139,6 +4151,14 @@ RawThreadUpdateEvent
 .. autoclass:: RawThreadUpdateEvent()
     :members:
 
+RawThreadMembersUpdate
+~~~~~~~~~~~~~~~~~~~~~~
+
+.. attributetable:: RawThreadMembersUpdate
+
+.. autoclass:: RawThreadMembersUpdate()
+    :members:
+
 RawThreadDeleteEvent
 ~~~~~~~~~~~~~~~~~~~~~~