1993 Other Mitsubishi Models Front Wheel Drive Automatic 232322 miles

I have a Mitsubishi Minica E-H22A LKUD 1993 model, 3cyl, carburetor engine. While I start my car in the morning, I don't have any problem starting the engine. But when I drove it about 15 minutes, it will stall and die and won't start. It will start running again if I wait for at least half an hours or more and after same problem after 15 minutes.