car cuts off when slowing down

Hi, Anyone can help me here, When im slowing down and let off the gas, push in the clucth, it cuts off? What do i do?

put it in neutral before you start slowing down and see what happens

what year is ur car?
my boys car does that and we had it looked at and they said that it was a fuel pressure problem. they didt get to find out were the problem came from bcuz my boy upgraded the whole fuel system but it did fix the problem.