Over Fear The Walking Dead's eight seasons, numerous cast members have left. In The Walking Dead franchise as a whole, big exits have often surprised fans, such as Andrew Lincoln (who plays Rick Grimes) in season 9 or Jeffrey DeMunn (who played Dale) in season 2 of the main show. Reasons tend to vary, whether it's at an actor's request or otherwise.
https://screenrant.com/fear-walking-dead-cast-exits-explained-nick-madison-alicia/