Scottish National League Division Three
| Formerly | National League Division One, Premiership Division Four, National League Division Four |
|---|---|
| Sport | Rugby union |
| Founded | 1973 |
| No. of teams | 10 |
| Country | Scotland |
| Most recent champion | Howe of Fife (3rd title) |
| Most titles | Gordonians, Howe of Fife, Lasswade, Perthshire (3 titles) |
| Level on pyramid | 4 |
| Promotion to | National League Division Two |
| Relegation to | National League Division Four |
| Domestic cup | National League Cup |
The Scottish National League Division Three (known as Arnold Clark National League Division 3 for sponsorship reasons) is the fourth tier of the Scottish League Championship for amateur rugby union clubs in Scotland.
The division was established in its current format in 2014 after the creation of three national leagues below the Premiership. This replaced the two regional Championship Leagues which were scrapped after just two seasons.