Pakistan has been battling a heavy flood that caused heavy casualties and material damage since June.
Finance Minister Ali Sabry said on Wednesday that Sri Lanka only had less than $50 million in usable foreign reserves.
The IMF has urged Sri Lanka to tighten its monetary policy, raise taxes, and adopt flexible exchange rates to overcome its debt crisis.
On Monday, the biggest fuel price hike was put in place, raising diesel prices by 64 per cent and petrol by 33 per cent per litre.
The country is facing protests over economic crisis, hours-long power cuts and shortages in fuel and other essential supplies.
