During the visit, India and Iran signed nearly a dozen agreements, the centrepiece of which was a deal on development of the strategic Chabahar port.
Saudi Arabia and Iran are locked in a decades-long struggle for regional dominance and back opposing sides in a bitter war that has attacked Yemen.
Iran Foreign Minister Mohammad Javad Zarif warns that US or Saudi attack would trigger 'all-out war'
While Yemen's Iran-backed Huthi rebels have claimed responsibility for Saturday's strikes on Saudi oil infrastructures, US said that it concluded the attack involved cruise missiles from Iran.
Trump has put in place a policy of 'maximum pressure' on Tehran over its disputed nuclear programme via crippling sanctions that are seen as raising the risk of conflict in the Middle East.
Zarif's presence had not been announced and represented an attempt by French host Emmanuel Macron to find a way to soothe spiralling tensions between Iran and the United States.
Washington is pursuing a 'maximum pressure campaign designed to force Iran to limit its nuclear and military activities.
During her tenure as External Affairs Minister, Sushma Swaraj had been active and popular on Twitter reaching out to the Indian diaspora in distress for assistance.
Iran's President Hassan Rouhani was speaking after US announced it was designating Zarif under sanctions that would freeze any of his assets.
The decision practically excludes the head of Iranian diplomacy Mohammad Javad Zarif from any possible future dialogue between Washington and Tehran.
It's a cat-and-mouse game that has become second nature in Iran, where the clerically-led government restricts access to popular social media sites and where U.S. sanctions create other barriers.
In new footage aired by Iranian state television, the crew of 18 Indians, three Russians, a Latvian and a Filipino are seen sitting around a table and seemingly going about their daily routines.
Iran detained the ship on allegations it failed to respond to distress calls and turned off its transponder after hitting a fishing boat.
King Salman bin Abdulaziz Al-Saud has approved hosting US Armed Forces in the Kingdom to increase joint cooperation in defence of regional security and stability and to preserve its peace.
"For 8 YEARS, Saddam (Hussein) showered our cities with missiles & bombs provided by East & West. Meanwhile, NO ONE sold Iran any means of defense. We had no choice but building our own."
Iran, for long, has maintained its ballistic missile program, under the control of its Revolutionary Guard, is for defensive purposes only.