According to The Sun, the US star will fly home at the start of June to be with her family and aunt.
A source told the paper: “Nicole is incredibly close with her auntie, she’s one of her closest friends and role models.
Show bosses are hoping former judge Mel B will step in and cover for Nicole at the initial auditions, joining Simon Cowell, Sharon Osbourne and Louis Walsh on the panel.
“There may be some clashes in her schedule due to other work, but if we can get these ironed out then she’ll be back on the show next year. Simon is keen to have Nicole back and wants everything signed off as soon as possible.”