3rd Brigade may refer to:
Australia edit
Canada edit
Croatia edit
France edit
India edit
Israel edit
Poland edit
South Africa edit
Spain edit
Ukraine edit
United Kingdom edit
United States edit
- 3rd Brigade Combat Team, 1st Infantry Division (United States)
- 3rd Brigade Combat Team, 1st Cavalry Division
- 3rd Brigade, 7th Infantry Division (United States)
- 3rd Brigade Combat Team, 10th Mountain Division
- 3rd Brigade, 104th Division (United States)
- 3rd Marine Expeditionary Brigade
- 3rd Signal Brigade (United States)
- 3rd Sustainment Brigade (United States)