The European Council president has said he would appeal to EU leaders to be open to the option of a long extension on Brexit.
Donald Tusk tweeted that he would "appeal to the EU27 to be open to a long extension if the UK finds it necessary to rethink its Brexit strategy and build consensus around it".
MPs are set to vote on Thursday as to whether to keep Britain in the EU longer than planned after Prime Minister Theresa May's authority over Brexit sustained another major blow.
Mrs May's deal was voted down by MPs on Tuesday by a majority of 149 votes.
The vote on extending Article 50 comes after MPs defied the government and dramatically decided to rule out a no-deal withdrawal from the EU in scenes some Tory Brexiteers described as "chaotic".
EU leaders will meet to discuss Brexit at an EU Council on March 21.