Corbyn was suspended in October after stating that allegations of antisemitism in the party were "dramatically overstated".
It comes after an investigation slammed the Labour Party over its response to allegations of anti-Semitism within its ranks.
The party's Corbyn faction and centre-left wing are engaged in an all-out war over what the future of the party should be.
General selection: The best pictures from the UK's parliamentary poll
Boris Johnson said he thought people should serve full prison sentences.
The left-wing Labour party, in contrast to the Conservatives, is de-emphasising Brexit and concentrating instead on domestic issues in its newly-released manifesto.
Boris Johnson says all candidates standing for the Conservatives have pledged to support his Brexit deal with the European Union.
Watson had long been a thorn in the side for the Labour left.