ISLAMABAD: The days of Pakistani Prime Minister Imran Khan, who is facing a no-confidence vote in parliament, are "numbered," an opposition leader said on Sunday. 

Opposition parties filed the no-confidence motion against Khan on March 8, saying the prime minister had lost his parliamentary majority after over a dozen defections by party lawmakers.

The opposition blames PM Khan for the deteriorating economy, a flawed foreign policy and poor governance in the country.

Maulana Fazlur Rehman, who heads the Pakistan Democratic Movement (PDM) opposition alliance, said the prime minister failed to "surprise" the nation at Sunday's rally of the ruling Pakistan Tehreek-e-Insaf (PTI) party. 

"No-trust vote is a parliamentary affair. Your days are numbered," Rehman said of the premier, during his address with supporters in Islamabad. 

"We can make you stand at any crossroads we wish, God willing. You are in our grip." 

The Pakistan Muslim League-Nawaz (PML-N) and the Jamiat Ulema-e-Islam-Fazl (JUIF) opposition parties invited their supporters to travel to the federal capital, in response to Sunday's show of power by the government. 

Addressing supporters in Gujranwala, PML-N vice president Maryam Nawaz said whoever her father and former Pakistan premier Nawaz Sharif was meeting in London was in the "interest of Pakistan." 

Her remarks were a response to PM Khan's comments in which, without naming Sharif, he said the nation wanted to know "who the man sitting in London is meeting and whose directions the characters in Pakistan are following." 

Khan said efforts were being made from abroad to influence the foreign policy of Pakistan and topple his government. 

Maryam criticized PM Khan for claiming he had proofs of the "foreign conspiracy" against his government. The prime minister should have revealed the "secrets" he decided to withhold at the rally, she said. 

Pakistan's National Assembly met briefly on Friday but Speaker Asad Qaiser adjourned the session without taking up the no-trust motion against PM Khan after prayers were offered for a lawmaker, who had passed away recently. The session was adjourned till Monday, March 28. 

The opposition requires at least 172 votes in the 342-member National Assembly to topple PM Khan’s government. The current party position in the lower house of parliament shows the opposition collectively has 162 members, while the government enjoys the support of 179 lawmakers, including its coalition partners.