The MRT 3, MRT Line 3 or MRT Circle Line is a proposed thirteenth rail transit line, the third Mass Rapid Transit line and the fourth fully automated and driverless rail system in the Klang Valley, Malaysia. Once completed, this line would form the loop line of the Klang Valley Integrated Transit System. The director of this project is currently Tuan Haji Mohd Yusof Kasiron. The circle line will be numbered .