India, which forced a postponement of the summit in February due to concerns about security in Dhaka, is committed to taking part in the November 12-13 meeting, although fresh violence could cause New Delhi to review its decision, Indian officials said.
"We are constantly monitoring the situation and keeping our fingers crossed," a senior Indian official told Reuters. "As of now, the decision is to go ahead with the summit."
Pakistan said it would not seek a delay despite its focus on a massive relief effort after this month's deadly earthquake.
Prime Minister Shaukat Aziz would represent Pakistan at the summit, a Pakistani spokeswoman said.
Founded in 1985, the South Asian Association for Regional Co-operation (Saarc) includes India, Pakistan, Bangladesh, Sri Lanka, Nepal, Bhutan and the Maldives. It aims to promote trade and co-operation in the region which is home to one-sixth of the world's population, many of whom live in abject poverty.
Aziz and Indian Prime Minister Manmohan Singh are expected to meet on the sidelines of the summit to discuss the India-Pakistan peace process.
The Saarc summit was originally scheduled for January but was postponed following the Indian Ocean tsunami. It was put off again in February after a former Bangladeshi finance minister was killed in political violence and India then declined to attend.
Security concerns grew further after an outlawed Islamist group exploded some 500 small bombs across Bangladesh in August, killing two people and wounding about 100. Two more people were killed in five bomb blasts this month.
The last SAARC summit, held in Islamabad in January 2004, agreed to launch a free trade area from 2006. But trade experts of member countries have yet to resolve differences over tariff cuts and were to hold talks in coming weeks to address them, SAARC officials said.