Sri Lanka’s prime minister says its debt-laden economy has “collapsed” after months of shortages of food, fuel and electricity, and the South Asian island nation cannot even purchase imported oil.

“We are now facing a far more serious situation beyond the mere shortages of fuel, gas, electricity and food. Our economy has completely collapsed. That is the most serious issue before us today,” Prime Minister Ranil Wickremesinghe told parliament.

Mr Wickremesinghe is also the finance minister tasked with stabilising the economy, which is floundering under the weight of heavy debts, lost tourism revenue and other impacts from the pandemic and surging costs for commodities.

“Currently, the Ceylon Petroleum Corporation is $US700 million ($A1 billion) in debt,” he told lawmakers. “As a result, no country or organisation in the world is willing to provide fuel to us. They are even reluctant to provide fuel for cash,” he said.

Mr Wickremesinghe said the government had failed to act in time to turn the situation around, as Sri Lanka’s foreign reserves dwindled.

“If steps had at least been taken to slow down the collapse of the economy at the beginning, we would not be facing this difficult situation today. But we lost out on this opportunity. We are now seeing signs of a possible fall to rock bottom,” he said.

Sri Lanka has been muddling through mainly supported by $US4 billion in credit lines from neighbouring India. But Mr Wickremesinghe said India would not be able to keep Sri Lanka afloat for too long.

Sri Lanka has already announced that it is suspending repayment of $US7 billion in foreign debt due for repayment this year, pending the outcome of negotiations with the International Monetary Fund on a rescue package. It must pay $US5 billion on average annually until 2026.

The foreign currency crisis has resulted in massive shortages that have forced people to stand in long lines to buy essentials, including fuel, cooking gas and medicine.

By Krishan Francis in Colombo