Seven of the men have already been returned to India, but details of the case remain scarce.
Qatar has freed eight former Indian naval officers previously sentenced to death accused of spying for Israel.
India's Ministry of External Affairs (MEA) thanked Doha on Monday when it announced that the octet had been released. Details about his arrest, sentencing and commutation of sentences remain unclear.
“We appreciate the decision of the Emir [Emir] of the State of Qatar to allow the release and return home of these citizens,” the ministry said in a statement in New Delhi.
The men were reportedly arrested in August 2022, over allegations that they had passed sensitive submarine-related information to Israeli intelligence. Neither Qatar nor India officially confirmed the charges.
A preliminary court sentenced them to death last year, prompting India to express deep shock and file an appeal.
The MEA confirmed in December that it had obtained consular access to the prisoners. Later that month, she said an appeals court had commuted her death sentence to varying prison terms.
On Monday he said seven of the men had already returned to India. No further details were given about the eighth man, the conditions of his release or the current status of the case.
Firm allies
The men's arrest last year made headlines in Indian and Arab media.
The eight were senior employees of Dahra Global Technologies and Consulting Services, a company that advises on a Qatari program aimed at obtaining high-tech, Italian-made submarines that could evade radar detection. The private company has since been closed.
While it briefly disrupted ties, the case appears unlikely to have a significant effect on relations between New Delhi and Doha, which are firm allies.
The couple continues to have extensive financial ties. Last week they signed a deal worth tens of billions of dollars that will secure Qatar's liquefied natural gas exports until the end of 2048.
