Last year's winner - who cancelled various appearances earlier this week due to exhaustion - will take to the stage on next Sunday's (December 1) results show, host Dermot O'Leary has confirmed.
He will be joined by 2010 runner-up Rebecca Ferguson, who is expected to perform her new single 'I Hope'.
On Friday (November 22), Arthur cancelled all public appearances and performances for the next seven days after being diagnosed with acute exhaustion.
A spokesperson for the 'Impossible' singer commented: "Unfortunately James Arthur has been diagnosed with acute exhaustion and instructed to rest for several days by his doctor.
"Regretfully, he has been forced to cancel all engagements during this period.
"James would like to apologise to his fans for any disappointment caused to them by these cancellations and he hopes to get back to full health as soon as possible."
Arthur has faced criticism in recent weeks for using a homophobic slur in a freestyle track he recorded. He swiftly apologised to those he offended.
However, Lucy Spraggan - who appeared on the 2012 series of The X Factor alongside Arthur - was embroiled in a public Twitter feud over the homophobic lyrics earlier this week.
Meanwhile, iTunes has reportedly offered a customer a refund on a James Arthur album she purchased following a complaint she made to the service after he used the slur.
The X Factor continues next Saturday (November 30) at 8pm on ITV. James Arthur and Rebecca Ferguson will perform on the results show next Sunday (December 1).