The 328 to 301 vote, made possible by fellow Conservatives who turned their back on Johnson's pleas, cleared the way for Johnson's opponents to introduce a bill that seeks to prevent Britain from leaving the European Union without a deal October 31.
Iranian Foreign Minister Mohammad Javad Zarif's presence had not been announced and represented a gamble by French host Emmanuel Macron who is seeking to soothe spiralling tensions between Iran and the US.
The nominations came after one of the longest summits in recent years, outstripping even all-night negotiations during the Greek debt crisis.
Most countries will be voting on Sunday, with the results expected overnight into Monday.
While the leader of the UN-backed government, Fayez al Sarraj, has failed to rally support from the EU states, Europe’s divided stance on Khalifa Haftar's military operation hinders any attempt to stop the ongoing war in Libya.
European leaders offered Britain a six-month delay to its Brexit departure, officials said. Britain's PM Theresa May, who had sought a delay only until June 30, has agreed to the offer.
European Union leaders gather for the beginning of an emergency EU summit moving closer to granting the United Kingdom a new delay for its departure from the bloc.
In a letter, British Prime Minister Theresa May had told the EU Council president Donald Tusk that she wanted to ensure her country left the bloc in an "orderly way," as she fights to have the current exit deal approved by parliament.
The European Union has granted the UK an extension until May 22, but only if Prime Minister Theresa May can get her agreement, which has already been resoundingly rejected twice, through parliament.
As Britain faces a sharp cliff-edge deadline of March 29 to leave, Prime Minister Theresa May's EU colleagues say the split could wait until May 22 if British lawmakers approve a withdrawal accord next week.
British Prime Minister Theresa May formally asked the European Union to postpone the UK's departure until June 30.
Lawmakers also rejected a call to use that time to hold a second Brexit referendum - a blow to the hopes of a large swath of Britons who still dream of keeping their European identities.
Subscribe to our Youtube channel for all latest in-depth, on the ground reporting from around the world.
Copyright © 2019 TRT World.