| Type: | I |
| Route: | 3 |
| Map: | Bulgaria roadmap bg I-3.svg |
| Map Notes: | I-3 road highlighted in orange |
| Country: | BGR |
| Length Km: | 203 |
| Terminus A: | , Byala |
| Terminus B: | , Botevgrad |
| Cities: | Pleven |
Republic road I-3 is a major road in Northern Bulgaria. It runs between I-5 road, at the city of Byala, and I-1 road, at Botevgrad. The total length of the road is 203km (126miles) and it follows the E83 road. I-3 road provides one driving lane per direction and it is planned to be superseded by Hemus motorway (A2).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. Road I-3 ends at Botevgrad.