"We will therefore defer the vote scheduled for tomorrow and not proceed to divide the house (of Commons) at this time." May added that she had spoken to "a number of EU leaders" over the weekend in advance of a bloc meeting Thursday.
"In advance of the European Council I will go to see my counterparts in other member states and the leadership of the Council and the Commission," she said.
"I will discuss with them the clear concerns that this House has expressed." At the same time she said Britain would step up preparations for a no-deal Brexit.
"For as long as we fail to agree a deal, the risk of an accidental no deal increases. So the government will step up its work in preparation for that potential outcome," she told parliament.
May faced a huge rebellion of her own Conservative MPs over the withdrawal agreement she struck in Brussels last month, while opposition parties are also lined up against her.
May held talks this weekend with leaders including EU President Donald Tusk and German Chancellor Angela Merkel.
The pound fell sharply against the dollar on the announcement, which increased uncertainty over whether Britain will agree any terms with the EU before it leaves the bloc in March next year.
EU won’t renegotiate deal
The European Union has already offered Britain the “best and only possible” Brexit divorce deal and will not renegotiate it, the European Commission warned Monday on the eve of a vote in the British parliament. “Our position has not changed and as far as we're concerned the United Kingdom is leaving the European Union on the 29th of March 2019,” spokeswoman Mina Andreeva told reporters. British Prime Minister Theresa May spoke with the president of the commission, Jean-Claude Juncker, on Sunday to give him “an update on the state of play” as she prepares to take the deal to parliament. And earlier Monday, the European Court of Justice ruled that Britain has the unilateral right to withdraw its plan to leave the European Union if it so decides before Brexit day at the end of March. But Andreeva said the court decision does not alter the European negotiating position. - Reuters