Left "Parks and Recreation" after its 2nd season by mutual agreement with the show's producers (it had been clear for a while that Schneider would not return for Season 3, leading to the full-time hiring of Adam Scott and a guest-star spot for Rob Lowe who would become a show regular for several years afterwards). While Mike Schur said that Schneider would return for guest spots himself, his character not only never returned to the show but was never mentioned again by any other characters. Before Season 7, Schur confirmed Schneider would not return and Schneider also said both that he hadn't been contacted to return and had zero interest in bringing his character back in any case.
I come from a really lovely, really smart family where the only stress was money and employment. It wasn't violence, it wasn't drink - it was money. I was a sensitive, runty, rednecky kid, and I absorbed my parents, stress about that. Now I find myself living in the epicenter of money, trying to define myself against it. I'm having a nice little swing here, but even if they come at me with a big paycheck - and they haven't, believe me - it won't fill the void that'll be created in me if I have to go out and lie to guys like you about loving a movie I'm in that I actually can't stand. That's gotta chip away at you.