The M3 line, also referred as Menderes–Konak Line (Turkish: Menderes–Konak Hattı) is a planned ATO rapid transit line in İzmir, Turkey.

The line has a total length of 22.3 km (13.9 mi) and would begin at Konak and run south into Menderes.

A tender was awarded in December 2019 for the implementation of the project of the line.

[2][3] The introductory meeting of the line, which will cost 2.105 billion euros, was held on 31 January 2023.

[4] The line will consist of eighteen stations, of which seventeen are new and one (Konak) will connect to the existing line.