The Brussels tramway network is a tram system serving a large part of the Brussels-Capital Region of Belgium. It is the 16th largest tram system in the world by route length, in 2017 providing 149.1 million journeys over routes 140.6 km (87.4 mi) in length. In 2018, it consisted of 18 tram lines. Brussels trams are operated by STIB/MIVB, the local public transport company.

The premetro and tram route 3, is a tram route operated by STIB/MIVB, which connects connects the Esplanade stop with the Churchill stop in the southern municipality of Uccle. The line is named after the planned Metro line 3, which is set to service most of the current route of tram line 3. The line was temporarily disbanded, but returned in service on 30 June 2008. The colour of the signage for this line is lime-green.