Iranian President Masoud Pezeshkian arrived in New Delhi on Friday for an 11-member BRICS summit where the Middle East conflict will be high on the agenda, Indian broadcasters showed.
Pezeshkian, on his first visit to India as leader, will hold talks with Indian Prime Minister Narendra Modi, the IRNA news agency said.
The two-day BRICS summit opens on Saturday.
"BRICS was established to counter unilateralism," Pezeshkian said, according to IRNA.
The grouping was created in 2009 as a forum for major emerging economies seeking greater influence in institutions dominated by Western powers.
It has since expanded and now includes Iran, Saudi Arabia and the United Arab Emirates -- countries at odds over the conflict launched by the United States and Israel in February.
UAE President Mohamed bin Zayed Al Nahyan is also expected in New Delhi, as is Saudi Foreign Minister Prince Faisal bin Farhan, according to India's foreign ministry.
Egyptian President Abdel Fattah El-Sisi will also be in New Delhi.
Modi, who met Pezeshkian in Bishkek this month, is expected to discuss energy and Indian investment in Iran's Chabahar port.
New Delhi has invested heavily in the port as an alternative trade route to Afghanistan and Central Asia that bypasses Pakistan.
However, recent conflict has added to concerns over the security and future of the port, while US sanctions have complicated India's engagement with Iran.
Pezeshkian will also meet Malaysian Prime Minister Anwar Ibrahim and South African President Cyril Ramaphosa, according to the IRNA news agency.