Fan Casting Put on a Bus in Sort by Tropes

So you're a film or TV show producer or the author of a book series, or the team behind a comic book, and you have a problem. You want a character out of the story, but you don't want to kill them off, you're not going to just flat out ignore them, and you certainly wouldn't have them just disappear for no reason and with no mention of it. However, there is a situation in which a character can be written out of a series in such a way that they can easily be returned later, if the creators so choose. They are Put on a Bus.