WRU Division Three West A
| Sport | Rugby union |
|---|---|
| Founded | 2014 |
| No. of teams | 10 |
| Country | Wales |
| Most recent champion(s) | Pembroke RFC (2017-18) |
| Level on pyramid | Level 3 |
| Promotion to | WRU Division Two West |
| Official website | WRU National Leagues |
The Welsh Rugby Union Division Three West A is a rugby union league in Wales. The founding of the division in 2014 was a result of the decision by the Welsh Rugby Union to localise club rugby, as the players were not willing to travel long distances to play their matches.