diff --git a/CHANGES.md b/CHANGES.md
index 1cefcd936322..fd03ae4d3889 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -84,6 +84,7 @@
 * X behavior was changed ([#X](https://github.com/apache/beam/issues/X)).
 * Yapf version upgraded to 0.43.0 for formatting (Python) ([#34801](https://github.com/apache/beam/pull/34801/)).
 * Python: Added JupyterLab 4.x extension compatibility for enhanced notebook integration ([#34495](https://github.com/apache/beam/pull/34495)).
+* Python: Argument abbreviation is no longer enabled within Beam. If you previously abbreviated arguments (e.g. `--r` for `--runner`), you will now need to specify the whole argument ([#34934](https://github.com/apache/beam/pull/34934)).
 
 ## Deprecations
 
diff --git a/sdks/python/apache_beam/options/pipeline_options.py b/sdks/python/apache_beam/options/pipeline_options.py
index b51b85963c69..f41d63bea4ac 100644
--- a/sdks/python/apache_beam/options/pipeline_options.py
+++ b/sdks/python/apache_beam/options/pipeline_options.py
@@ -290,7 +290,7 @@ def __init__(self, flags: Optional[Sequence[str]] = None, **kwargs) -> None:
 
     # Build parser that will parse options recognized by the [sub]class of
     # PipelineOptions whose object is being instantiated.
-    parser = _BeamArgumentParser()
+    parser = _BeamArgumentParser(allow_abbrev=False)
     for cls in type(self).mro():
       if cls == PipelineOptions:
         break
@@ -405,7 +405,7 @@ def get_all_options(
     # sub-classes in the main session might be repeated. Pick last unique
     # instance of each subclass to avoid conflicts.
     subset = {}
-    parser = _BeamArgumentParser()
+    parser = _BeamArgumentParser(allow_abbrev=False)
     for cls in PipelineOptions.__subclasses__():
       subset[str(cls)] = cls
     for cls in subset.values():