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 | Lt Col R A J M Ranasinghe USP psc |
| 2 IC | Maj Y G G Suraj psc |
| Adjt | Capt M A K U Dias |
