They fell by $7.27 billion from the prior week, the sharpest decline since the week ended Feb. 10.
The changes in foreign currency assets, expressed in dollar terms, include the effects of appreciation or depreciation of other currencies held in the Reserve Bank of India's (RBI) reserves.
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The forex reserves include India's Reserve Tranche position in the International Monetary Fund.
The RBI also intervenes in the spot and forwards markets to prevent runaway moves in the rupee.
In the week for which the forex reserves data pertains, the rupee dropped to a 10-month low of 83.16 against the US dollar, prompting intervention from the RBI, as per traders.
Earlier this week, RBI Governor Shaktikanta Das reiterated that the central bank has no specific target for the rupee.
The currency ended at 82.6475 on Friday, rising more than 0.5% for the week and logging its best weekly performance since July 14.