"Our consistent priority to safeguard the interests of the Indian consumer in a volatile energy scenario. Our import policies are guided entirely by this objective," the spokesman said.
Oil and gas are Russia's biggest exports, and Moscow's biggest customers include China, India and Turkey.
"Now I've got to get China to do the same thing," Trump said in the Oval Office on Wednesday, as part of his administration's broader push to cut off Moscow's energy funding.
The Trump administration is also pushing Japan to stop importing oil and gas from Russia, and US Treasury Secretary Scott Bessent said he communicated this "expectation" to visiting Japanese Finance Minister Katsunobu Kato on Wednesday.
India cannot "immediately" halt oil shipments, Trump said, adding that the shift will be "a little bit of a process, but the process is going to be over with soon".
The Trump administration has imposed 50% tariffs on goods from India, levies that Trump has characterised as punishment against Delhi for buying Russian oil and weapons.
The tariffs – which took effect in August and are among the highest in the world – include a 25% penalty for transactions with Russia that are a key source of funds for its war in Ukraine.
Modi has for months stood his ground, arguing that India is neutral in the Russia-Ukraine war despite his country's ties with Russian leader Vladimir Putin.