Like all things on the low FODMAP diet, it depends on what kind of pumpkin you want to eat. Canned pumpkin was tested safe by Monash Food App at 1/3 cup per meal. The second best option is Japanese pumpkin, also known as kabocha squash, which tested safe at 2/3 cup per meal. Watch the serving size and test your individual tolerance, and as always, listen to your gut.