The number of his top team who have stepped down so far continued to rise, including Indian-origin shadow minister to the Treasury Seema Malhotra.
Corbyn had lost 12 of his shadow cabinet yesterday and at least eight more today, with most criticising his performance in the EU referendum, which resulted in Brexit.
Labour's deputy leader, Tom Watson, held a meeting with Corbyn to warn him that he has "no authority" among party MPs and faces a serious leadership challenge as the figure of total party resignations including junior ministers hit around 28 MPs.
"I regret there have been resignations today from my shadow cabinet. But I am not going to betray the trust of those who voted for me - or the millions of supporters across the country who need Labour to represent them," he said.
More From This Section
"One clear message from last Thursday's vote is that millions of people feel shut out of a political and economic system that has let them down and scarred our country with grotesque levels of inequality,"he added.
Stephen Kinnock, a parliamentary aide to shadow business secretary Angela Eagle, has also quit, citing Jeremy Corbyn's "half-hearted and lacklustre role" in the EU campaign.
The motion of no confidence in Corbyn was submitted by Labour MPs Dame Margaret Hodge and Ann Coffey and a secret ballot could be held on Tuesday.
The mass resignations in the party were triggered by the sacking of shadow foreign secretary Hilary Benn in the early hours of yesterday, after he told Corbyn he had lost confidence in him.
Former shadow leader of the Commons Chris Bryant, who was among those to resign, warned Corbyn that he risks going down in history as"the man who broke the Labour Party".
The Labour Party campaigned for Remain during the referendum, which saw the UK voting to leave the EU by 52-48 per cent last week.
Meanwhile, a number of senior trade unionists on Labour's ruling national executive committee rallied in support of Corbyn.
About 180,000 people have signed an online petition backing the Labour leader, who was elected last September in a landslide victory.