Is it safe to eat hummus when it's been left out of the frig for 3 hours?

It's generally not safe to eat hummus that has been left out at room temperature for more than two hours, as bacteria can grow rapidly in perishable foods. If the hummus has been left out for three hours, it's best to err on the side of caution and discard it to avoid potential foodborne illness. Always refrigerate hummus promptly after serving.