The election campaign has been largely focused on national security in the wake of Britain's third major terror attack this year.
Corbyn replaced Abbott on Wednesday with Lyn Brown, the party's spokeswoman on police matters, due to ill health.
Speaking after the London attack, Mrs May said "enough is enough" and that "things need to change" in the terror fight.
Addressing activists in Slough on Tuesday evening, she did not make any specific new policy proposals but said: "I mean longer prison sentences for those convicted of terrorist offences". May said she will introduce tougher anti-terrorism measures if she wins the general election on Thursday, including restricting the movement of suspects when the authorities do not have enough evidence to prosecute them.
"And I mean doing more to restrict the freedom and the movements of terrorist suspects when we have enough evidence to know they present a threat, but not enough evidence to prosecute them in full in court", she added.
"If human rights laws stop us from doing it, we will change those laws so we can do it", May said. However, May clarified that she only wants to impose travel restrictions on terrorist suspects. "I will listen to what they think is necessary for us to do", she said.
Sources suggest if elected on Friday, Theresa May might consider ideas of curfews, controls on who people can visit and suspects' access to communications.
Keir Starmer, Labour's shadow minister for Brexit, said the prime minister's calls for a review of the human rights laws were nothing more than a "diversionary tactic" to draw attention from a lack of funding.
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Labour has immediately cried foul, claiming another manifesto U-turn, at nearly the last minute of the campaign.
The criticism came after Ms May, on the campaign stump last night, suddenly announced she would not allow human rights laws to stand in the way of preventing jihadis carrying out atrocities in Britain.
He said: "Theresa May is simply posturing about being tough on terror as she panics that her abysmal record is coming under scrutiny".
But Pensions Secretary Damian Green insisted that the party's commitment, in its manifesto, to remain in the European Convention of Human Rights for the next parliamentary term wouldn't be affected.
Labour leader Jeremy Corbyn has accused May of cutting police numbers by 20,000 officers, while London's Labour mayor Sadiq Khan warned the Metropolitan Police has made as many cuts as it can, adding he's anxious about the impact of further planned savings in the capital's police budget by the government.
Theresa May said she'd be willing to tear up human-rights legislation to combat terrorism in a move the Labour opposition said was an attempt to distract from her cuts to police, as security dominated the closing stages of the United Kingdom election campaign.
"A lot of people are saying, this is actually the way to go, but it's very hard to do and very under-resourced as well", he said.
Liberal Democrat leader Tim Farron accused the prime minister of launching a "nuclear arms race" in terror laws.