The 42-year-old singer - who is a judge on the talent show alongside Steven Tyler and Randy Jackson - reportedly wants to free up her busy schedule to spend more time with her four-year-old twins Max and Emme.
She told E!: ''It is just like any working mom's dilemma. It's tough. It's a balancing act. You put them first and then you have all these other things that you have to do, that you have to give your time to as well, and you have to make sure that they're OK in the process.''
Jennifer is also set to embark on a 20-date tour of North and Latin America this summer and she is currently working on a new album, but the brunette beauty is said to be ''forever grateful'' for doing 'American Idol'.
A source told Us Weekly magazine: ''There is just too much going on for her right now.
''She regrets she can't stay on the show. It's been an incredible experience and she is forever grateful that she did it.''