Prime Minister Narendra Modi said he was “deeply saddened” by the death.
“Deeply saddened,” Modi tweeted. “He was an admirable diplomat, a great friend of India and a fluent Hindi speaker who tirelessly contributed to stronger India-Russia ties.”
External Affairs Ministry spokesperson Vikas Swarup also paid homage to the envoy.
“In Kadakin, we lost a valued friend who nurtured India-Russia relationship for many decades as a distinguished Russian diplomat,” Swarup said.
Kadakin had been the Russian ambassador to India since 2009.