diff --git a/CHANGES/8636.breaking.rst b/CHANGES/8636.breaking.rst
new file mode 100644
index 00000000000..ae3d599bf7a
--- /dev/null
+++ b/CHANGES/8636.breaking.rst
@@ -0,0 +1 @@
+Removed ``Request.wait_for_disconnection()`` which was mistakenly added briefly in 3.10.0 -- by :user:`Dreamsorcerer`.
diff --git a/aiohttp/web_request.py b/aiohttp/web_request.py
index 28d9ef3d10b..a485f0dcea6 100644
--- a/aiohttp/web_request.py
+++ b/aiohttp/web_request.py
@@ -19,7 +19,6 @@
     MutableMapping,
     Optional,
     Pattern,
-    Set,
     Tuple,
     Union,
     cast,
@@ -50,7 +49,6 @@
     reify,
     sentinel,
     set_exception,
-    set_result,
 )
 from .http_parser import RawRequestMessage
 from .http_writer import HttpVersion
@@ -146,7 +144,6 @@ class BaseRequest(MutableMapping[str, Any], HeadersMixin):
             "_loop",
             "_transport_sslcontext",
             "_transport_peername",
-            "_disconnection_waiters",
         ]
     )
 
@@ -194,7 +191,6 @@ def __init__(
         self._task = task
         self._client_max_size = client_max_size
         self._loop = loop
-        self._disconnection_waiters: Set[asyncio.Future[None]] = set()
 
         transport = self._protocol.transport
         assert transport is not None
@@ -823,21 +819,18 @@ async def _prepare_hook(self, response: StreamResponse) -> None:
 
     def _cancel(self, exc: BaseException) -> None:
         set_exception(self._payload, exc)
-        for fut in self._disconnection_waiters:
-            set_result(fut, None)
 
     def _finish(self) -> None:
-        for fut in self._disconnection_waiters:
-            fut.cancel()
-
-    async def wait_for_disconnection(self) -> None:
-        loop = asyncio.get_event_loop()
-        fut = loop.create_future()  # type: asyncio.Future[None]
-        self._disconnection_waiters.add(fut)
-        try:
-            await fut
-        finally:
-            self._disconnection_waiters.remove(fut)
+        if self._post is None or self.content_type != "multipart/form-data":
+            return
+
+        # NOTE: Release file descriptors for the
+        # NOTE: `tempfile.Temporaryfile`-created `_io.BufferedRandom`
+        # NOTE: instances of files sent within multipart request body
+        # NOTE: via HTTP POST request.
+        for file_name, file_field_object in self._post.items():
+            if isinstance(file_field_object, FileField):
+                file_field_object.file.close()
 
 
 class Request(BaseRequest):
diff --git a/docs/web_reference.rst b/docs/web_reference.rst
index ddd5a3c264c..bb22cfd6369 100644
--- a/docs/web_reference.rst
+++ b/docs/web_reference.rst
@@ -510,19 +510,6 @@ and :ref:`aiohttp-web-signals` handlers.
           required work will be processed by :mod:`aiohttp.web`
           internal machinery.
 
-   .. method:: wait_for_disconnection()
-
-      Returns when the connection that sent this request closes
-
-      If there is no client disconnection during request handling, this
-      coroutine gets cancelled automatically at the end of this request being
-      handled.
-
-      This can be used in handlers as a means of receiving a notification of
-      premature client disconnection.
-
-      .. versionadded:: 3.10
-
 .. class:: Request
 
    A request used for receiving request's information by *web handler*.