"There was no question of pulling out when there was no summit to attend", Foreign Minister Mangala Samaraweera told Parliament.
He said Sri Lanka had regretted that conditions were not conducive to holding the Summit.
Samaraweera said the Lankan statement was released only after several countries had issued statements with their intention to pull out.
"We will take part (in the summit) whenever it happens," he said.
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Samaraweera said the South Asian region must unite against terrorism.
"Terrorism must unite our region not divide it," he said while inviting the region's leadership to forget the past and unite against terrorism.
Sri Lanka on Sepember 30 pulled out of 19th SAARC Summit in Islamabad, becoming the fifth country to do so after India, Bhutan, Afghanistan and Bangladesh.
"Sri Lanka regrets that the prevailing environment in the region is not conducive for holding the 19th SAARC Summit in Islamabad," the Foreign Ministry had said in a statement.
Besides India, three other SAARC members -- Bangladesh, Bhutan and Afghanistan -- had pulled out of the summit, indirectly blaming Pakistan for creating an environment which was not right for the successful holding of the meet.
Citing continuous cross border terrorism by Pakistan, India had announced last month that "in the prevailing circumstances, the Indian government is unable to participate in the proposed Summit in Islamabad."
SAARC member states include Afghanistan, Bangladesh, Bhutan, India, Nepal, the Maldives, Pakistan and Sri Lanka.
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