This article is about the Class III road numbered C3 maintained by DfI Roads.
For other roads numbered C3, see C3
The C3 is a lengthy route on the south western edge of Belfast starting on the B103 on the edge of Finaghy and passes through the suburbs of Dunmurry and Kilwee. The route here also includes a short spur along Old Golf Course Road to meet the A512 at a roundabout nearby. Continuing northwards beyond the A501 and up into the hills the road follows Glenside Road and terminates on the B38 just by its fork with the B154.