Previously, President Sirisena adjourned the sessions until November 16.
Sri Lanka promised the European Union in 2016 it would work toward reconciliation with Tamils, who mostly live in the north and east of the predominantly Buddhist nation, through greater political and economic autonomy.
Since the war with the LTTE ended in 2009, the Sri Lankan government has denied that those imprisoned LTTE members are political prisoners. On the other hand, skeptics think that Rajapaksa's return to power through what some are describing as an anti-constitutional coup is part of a Chinese plot to geopolitically compensate for the relative losses that it's expected to experience in the Maldives after Chinese-friendly President Yameen failed to be reelected in late September following his surprise loss to a very pro-Indian opposition politician. "Only through the constitutional, parliamentary system of Sri Lanka can the country be saved from this perilous situation".
The Sri Lanka Muslim Congress (SLMC) party, which has seven lawmakers, said its members had also rejected offers to join the Sirisena-Rajapakse camp.
Rajapaksa's party dismissed the allegation.
Almost all politicians who left the UNP took up ministerial posts in the new cabinet.
"If Ranil (Wickremesinghe) gets a vote of confidence, the president said that within one hour, he'll resign, which means he will dissolve the government", Rambukwell said.
Sri Lanka regained the GSP plus preferential treatment in 2017.
"The Chinese were giving the loans and had been given the first option". Rajapaksa's return could increase China's clout in Sri Lanka. On Tuesday, thousands of Sri Lankans protested in the capital demanding Sirisena immediately convene Parliament.
Sirisena had replaced him with former strongman Mahinda Rajapaksa and suspended Parliament until November 16 in an apparent attempt to give Rajapaksa time to muster enough support to survive any no-confidence vote.
Leader Ranil Wickremesinghe stated that his party was preparing its next course of action in the event of Parliament not being reconvened this week.
Wickremesinghe says his dismissal is unconstitutional.
Mr Wickremesinghe said his party will step up a public campaign for Parliament to be called and he be allowed to prove his majority.
India will have to keep a keen watch on the developments and ensure that the island does not take a Chinese turn.