The meeting between the three top Opposition leaders took place at the Bilawal House in Islamabad, hours after they ousted Imran Khan as the prime minister after the cricketer-turned-politician lost the no-confidence vote in the National Assembly.
A 15-point agenda of Friday's session issued by the Secretariat on Thursday night also includes the no-confidence motion.
Refuting the news of the resignation of Pakistan's Deputy Speaker Qasim Suri, the National Assembly Secretariat on Sunday clarified that Suri did not resign from his office, reported local media adding that he will chair the crucial National Assembly on Monday for the election of the new Prime Minister of Pakistan.
The Pakistan National Assembly's crucial session on a no-trust motion against embattled Prime Minister Imran Khan was adjourned on Friday without tabling of the resolution, amid vociferous protests from opposition lawmakers.
Talking to reporters in Islamabad, he said the Opposition has laid all of their cards, but the no-confidence motion against him would not be successful.
Pakistan Muslim League-Nawaz president and Leader of Opposition in National Assembly Shehbaz Sharif, 70, who is the Opposition's candidate for the new prime minister, will announce his possible government priorities after taking the oath.
Very few members of the treasury benches were seen in attendance.
The Opposition parties need 172 members in the 342-member house to orchestrate the downfall of Prime Minister Khan.
The National Assembly session for the move is expected to be convened on March 21 and the voting is likely to be held on March 28.
There are reports that the government may try to physically prevent opposition members and nearly two dozen PTI dissidents from reaching the Parliament House through protestors.
Around 100 lawmakers from the Pakistan Muslim League-Nawaz and Pakistan Peoples' Party submitted the no-confidence motion before the National Assembly Secretariat on March 8, alleging that the Pakistan Tehreek-e-Insaaf government led by Khan was responsible for the economic crisis and the spiralling inflation in the country.
The Pakistani PM said that one who solves the Kashmir dispute to pave the way for peace and human development in the subcontinent should receive the award.
Pakistan Muslim League-Nawaz (PML-N) president Sharif, 70, and Pakistan Tehreek-i-Insaf (PTI) vice-chairman and former foreign minister Shah Mahmood Qureshi on Sunday filed their nomination papers for the post.
The move came hours after Khan was removed from office through a no-confidence vote held early Sunday morning, becoming the first premier in the country's history to be sent home after losing the trust of the House.
Now, the bill will undergo a similar process in the National Assembly, wherein the ruling Nepal Communist Party commands two-thirds majority.