| 3rd (County Down) Battalion, Ulster Defence Regiment | |
|---|---|
 Regimental Insignia | |
| Active | 1970–1992 |
| Country |  United Kingdom |
| Branch |  British Army |
| Type | Infantry battalion |
| Role | Internal Security |
| Size | 750 |
| Regimental Headquarters | Lisburn |
| Motto(s) | "Quis Separabit" (Latin) "Who Shall Separate Us?" |
| March | (Quick) Garryowen & Sprig of Shillelagh. (Slow) Oft in the Stilly Night |
| Commanders | |
| Colonel Commandant | First: General Sir John Anderson GBE, KCB, DSO. Last: General Sir Charles Huxtable, KCB, CBE, DL |
| Colonel of the Regiment | Colonel Sir Dennis Faulkner CBE |
3rd (County Down) Battalion, Ulster Defence Regiment (3 UDR) was formed in 1970 as part of the seven original battalions specified in The Ulster Defence Regiment Act 1969, which received Royal Assent on 18 December 1969[1] and was brought into force on 1 January 1970.[2][3] It was, along with the rest of the regiment, amalgamated with the Royal Irish Rangers in 1992 to form the Royal Irish Regiment.
- ^ "No. 44996". The London Gazette. 29 December 1969. p. 129747.
- ^ Statutory Instrument, 1969 No. 1860 (C. 58), The Ulster Defence Regiment Act 1969 (Commencement) Order 1969
- ^ The New Law Journal, Volume 120, Part 1