Runs, but sputters out

Hi. I have had my car for only 2 years now, but it continuously has issues. I’ve been in and out of mechanic shops for numerous of times. Replaced majority of everything; battery, relay, fuel pump two times and catalytic converter. I’ll be driving on the freeway/near by and my car will sputter out. It won’t turn over when I shut off my ignition but when my car sits on the side for a few days it will start but only for 10 minutes and sputter out again. I don’t know what else to do at this point. It costing me a lot of money.