In October 1940, as part of a reorganisation of the Commando formations, the unit was amalgamated with No. 8 (Guards) Commando into a single special service battalion known as the 4th Special Service Battalion, under the command of Lieutenant Colonel Robert Laycock. As a part of this organisation, the unit's name was changed to 'A' Special Service Company. At the end of 1940, the special service battalions were reorganised into a headquarters and two Commandos and the name of the unit reverted to No. 3 Commando. In January 1941 the special service battalions were broken up, the Commandos were delinked and raised back to full battalion-sized units themselves.