The M3 road is a short metropolitan route in the City of Tshwane in Gauteng, South Africa.

It consists of only one road (Nelson Mandela Drive) in the Pretoria CBD.

The M3 begins by heading north-north-east as Nelson Mandela Drive, parallel to the M5 and following the Apies River, to separate the Pretoria CBD in the west from the Sunnyside suburb in the east, where it meets the M11 route (Scheiding Street; Rissik Street) and the M6 route (Kotze Street; Visagie Street).

[5] Just after meeting the M6, it reaches a junction with the M2 route (Nana Sita Street).

The M3 continues northwards, still parallel to the M5 and following the Apies River, separating the Pretoria CBD in the west from the Arcadia suburb in the east, meeting the R104 route (Stanza Bopape Street; Helen Joseph Street), to reach its end at a junction with the M4 route (Johannes Ramokhoase Street; Edmond Street).