- Tag results for Sri Lanka
While the speaker was about to take a vote on fresh elections prompted by PM Mahinda Rajapaksa, supporters of the PM surrounded the speaker.
But Stokes, who on Wednesday had failed with the bat as England's new number three, broke the partnership when he pounced to run out Karunaratne with a direct throw from gully.
The former Sri Lankan captain has obtained the SLPP membership, party secretary Sagara Kariyawasam announced.
The tourists elected to bat in their bid for a series-clinching win but lost four wickets before lunch on a pitch already assisting spinners in Kandy.
Speaker Karu Jayasuriya ruled that a majority of the 225-member assembly supported the motion against Rajapakse who was made prime minister on October 26 in place of Ranil Wickremesinghe.
All eyes were on Ben Stokes, elevated to number three, in an unchanged team from the first Test thrashing of the hosts in Galle last week.
Jonny Bairstow injured his ankle playing football during training in the one-day international series that England won 3-1 but is reported to be ready again.
The decision came after the court adjourned hearing on the 13 fundamental rights petitions filed by several political parties.
Sirisena on October 9 dissolved parliament and announced snap polls on January 5 next year after it became evident that he did not have enough support in the House to prove the premiership of Rajapaks
The UN chief has expressed concern over Sri Lankan political turmoil and emphasised the "utmost importance" of respecting the democratic processes in the island nation.
Along with the Rajapaksa father-son duo, former parliamentarians representing the United People's Freedom Alliance (UPFA) also joined SLPP, according to Colombo Page.
The match officials' report, which was handed over to the Sri Lanka team management, cited concerns about the legality of the 25-year-old's bowling action.
Expressing deep shock over the dissolution of Lankan Parliament, DMK president MK Stalin said Sirisena had created a big threat to the welfare of Tamils by creating this kind of constitutional crisis.
The leader of the opposition in the Tamil Nadu assembly, dubbed the move as a political emergency that threatened stability and jeopardised the welfare of Tamils.
England got off to a shaky start in Galle, losing five wickets for just 103 runs, with debut opener Rory Burns back in the pavilion for nine, Moeen Ali out first ball and Ben Stokes gone for seven.