3 Forward Observation Unit (Airborne) RA was formed in June 1944 with a mixture of Royal Artillery and Royal Canadian Artillery personnel, some coming from Naval Bombardment Units. The unit returned to the UK in June 1945 and its younger members were posted to 2 FOU. The unit was disbanded in October 1945 with the remaining personnel going to 1 FOU.
Illustrations of the formation badges under which a unit served or supported are given. This is no guarantee that the unit used this formations badge.
| Jun 44 | Formed | Eboli, Italy | |
| Aug 44 |  |
2 Independant Parachute Brigade | Frejus, Cote d’Azur, France Operation Dragoon |
| Aug 44 | Central Mediterranean Forces | Rome, Italy | |
| Sep 44 | |
2 Independant Parachute Brigade | Athens & Salonika, Greece Operation Manna |
| Dec 44 | |
2 Independant Parachute Brigade | Collefero range, Italy |
| Feb 45 |  |
6 Army Group RA | Florence, Italy |
| Jun 45 | UK | ||
| Oct 45 | Disbanded |