Why is my 2008 Acura RDX Sport Utility stalling?

My 2008 Acura RDX Sport Utility Vehicle for some reason keeps stalling every time I come to a stop or when it is idle. I have already bought a new battery, spark plugs, alternator, intake filter, cabin filter, and fuel pump. Yet still it continues to turn off when I’m driving or come to a complete stop. What could it be and how do I fix it??? Thank you.