0841 GMT May 22, 2018
Sirisena will hold talks with his Iranian counterpart Hassan Rouhani on strengthening cooperation in the energy sector and will also seek Iranian investment, according to an official statement, outlookindia.com reported.
The two officials will sign a memorandum of understanding on "further strengthening the economic and trade ties between the two countries".
The visit comes as world leaders scramble to salvage a key nuclear deal with Iran after President Donald Trump withdrew the United States from the accord.
Before the sanctions regime, Iran had been a key buyer of Sri Lankan tea — the island's main export.
Sri Lanka's only oil refinery is geared to handle Iranian light crude.
Iran pledged $450 million for an irrigation project in Sri Lanka in 2008, but the funds were delayed due to the sanctions.
Sirisena's office said he will also attend a special investment and trade forum organized by the Iran Chamber of Commerce. , the