| Country: | HUN |
| Type: | MR |
| Route: | 3 |
| Length Km: | 247 |
| Length Round: | 1 |
| Terminus A: | Budapest |
| Junction: |
|
| Terminus B: | Tornyosnémeti border with |
| Counties: | Pest, Heves, Borsod-Abaúj-Zemplén |
| Cities: | Budapest, Kistarcsa, Kerepes, Gödöllő, Aszód, Hatvan, Gyöngyös, Füzesabony, Mezőkövesd, Emőd, Nyékládháza, Miskolc, Felsőzsolca, Szikszó, Encs |
The Main road 3 (Hungarian: 3-as főút) is a west–east direction First class main road in Hungary, that connects Budapest with Tornyosnémeti (the border of Slovakia). The road is long.[1]
The existing route is a main road with two traffic lanes, except for introductory path of Gyöngyös, which is partially built with four traffic lanes. Most of the traffic was taken over by M3, and M30 motorway.
The road, as well as all other main roads in Hungary, is managed and maintained by Magyar Közút, state owned company.