Headquarters of 3rd Battalion Mechanized Infantry Regiment is deployed at Welikanda in Eastern Theatre. The Battalion consists with WMZ 551 B wheeled APCs to secure and maintain the security covering all areas of the Country. The Battalion is performing duties under Mechanized Infantry Brigade.
Present Appointments
| Commanding Officer | -Maj H M J P Heenkenda USP psc |
| 2 IC (Overlokking) | -Maj R A J M Ranasinghe USP psc |
| Adjt | -Capt C Rajapaksha |
