Rob Schneider was not in Grown Ups 2 mainly due to a combination of scheduling conflicts and financial issues. At the time, Schneider was focusing on his own CBS sitcom "Rob," which overlapped with the production schedule of Grown Ups 2. Additionally, Schneider mentioned that he was not paid enough for the sequel, which contributed to his decision not to return. Personal reasons such as becoming a new father and concentrating on his stand-up career also played a role. Despite rumors, there was no falling out between Schneider and Adam Sandler, as they have continued to work together in later films.