Republic road I-3 (Bulgarian: Републикански път I-3) is a major road in Northern Bulgaria.

I-3 road provides one driving lane per direction and it is planned to be superseded by Hemus motorway (A2).

Road I-3 begins from junction with I-5 road, south of Byala, Ruse Province.

It runs west through the Danubian Plain and crosses the centres of several villages before reaching Pleven, the seventh largest city in Bulgaria.

The road bypasses Pleven from north and then runs southwest.