Sir Keir Starmer said he could not see how Jeremy Corbyn could stand as a Labour candidate at the next election.
Former Labour leader Mr Corbyn had the whip removed over his response to the scathing Equality and Human Rights Commission (EHRC) report into antisemitism in the party.
Sir Keir, who replaced Mr Corbyn as leader in 2020, said: “I don’t see the circumstances in which he will stand at the next election as a Labour MP.”
Asked if he believed Mr Corbyn could stand as an independent against a Labour candidate, Sir Keir told BBC Radio 4’s Today: “I can only speak for the Labour Party, I can’t speak for Jeremy on this.”
Mr Corbyn said the whip was “wrongly removed and it should be reinstated”.
He said: “I am honoured to be the full-time representative of Islington North, and will continue to tackle the most important issues – the cost-of living crisis, stagnant wages and growing inequality – affecting my constituents.
“I was elected as a Labour MP and proud to be so. I have made it clear that the whip was wrongly removed, and it should be reinstated.
“Labour members have the democratic right to choose their candidate. Currently, members in Islington North are being denied that right, and it should be restored immediately.”
Mr Corbyn had the whip removed and was suspended by Labour in the aftermath of the highly critical EHRC report in 2020.
He had his party membership reinstated within weeks, but Sir Keir refused to readmit him to the group of Labour MPs.
In his initial response to the EHRC report, Mr Corbyn claimed the scale of antisemitism in the party had been “dramatically overstated for political reasons” by opponents both inside and outside Labour, along with the media.
But he later attempted to clarify his comments in a statement to the party, saying concerns about antisemitism are “neither ‘exaggerated’ nor ‘overstated’”.