The impact of the long history of Indo-Soviet cooperation during the Cold War is too significant to be erased or wished away.
India, a Cold War ally of the Soviet Union, last year agreed to buy five S-400 systems for $5.2 billion, and Russia has said that delivery is on track.
Modi, who arrived in Russia on a two-day visit, is the first Indian prime minister to visit to the Russian Far East Region.
Noting that India-US strategic partnership was based on deep and broad convergence, Jaishankar said discussions with Pompeo were held on key issues including energy and trade as well as on the situation in Afghanistan and the Indo-Pacific region.
Calling it an excellent meeting, Modi said a wide range of subjects were discussed which would further cement the friendship between the three nations and enhance world peace.
Under the CAATSA sanctions, only Trump has the authority for the presidential waiver to India on weapons deal with sanctions-hit Russia.
Only last month, US had used CAATSA to impose sanctions on Chinese entities for purchase of S-400.
India has not chosen the new site yet, which could be controversial as the country has seen vehement protests against new nuclear sites.
India agreed a deal with Russia to buy S-400 surface to air missile systems.