The former judge was due to return to the ITV programme for the live shows of the current series, but said she has now decided “to pass”.
Her decision comes just weeks after she called Simon “fat faced” and “a fucking pain in the arse” in an expletive-filled rant on a US radio show.
She even expressed her relief at not judging the auditions for the current series, saying: “I don’t have to have those kids singing in my face. They all suck, and it’s like: is this karaoke or what?”
But on Sunday evening she confirmed she would not be returning to the show in a post on her official Facebook page.
She wrote: “This is my official statement regarding X Factor. If it reads differently in the papers then it’s been altered:
“After watching the new season #XFactor unfold, I’ve seen the new judges finding their rhythm and are doing brilliantly.
“Simon was so gracious to find me a spot on the live shows but at this point I really don’t think I’m needed and I would honestly feel odd coming in at this point. So I have decided to pass on the series this year.
“I wish the show continued success and as much as I love to get my face on TV you will have to do without me this season.
“Loves ya, Mrs. O.”
Despite claims Sharon’s comments had cast doubt on her ‘X Factor’ role, Simon laughed them off last month, telling The Sun: “You know what… how many times have I heard that? Sometimes people get overexcited and they say things they may regret.
“But how many years have I worked with her? A long time!”
Asked if he would work with her again, he replied: “One hundred per cent. Words don’t hurt me.”
An ‘X Factor’ spokesperson has also issued a statement following Sharon’s announcement that she won’t be appearing on this year’s series.
It reads: “The X Factor can confirm Sharon Osbourne has decided not to return to this year’s show. Sharon will always be a big part of The X Factor family and we wish her all the best for the future.”