The 3rd South African Infantry Brigade was an infantry brigade of the army of the Union of South Africa during World War II. The Brigade formed part of the South African 1st Infantry Division and was formed on 13 August 1940. It served in the Western Desert and was disbanded on 1 January 1943. During the Western Desert Campaign (at the time of the Second Battle of El Alamein), the Officer Commanding was Brig. R.J. Palmer and the brigade comprised the following units: