While Canadian Prime Minister Stephan Harper has had two mentions and Russian President Putin received warm words on Monday, Modi has conspicuously made no reference at all to the leaders of the world's most powerful democracy.
Washington, along with European powers, boycotted the 63-year-old for a decade and denied him a visa over religious riots that erupted in 2002 during his tenure as chief minister of Gujarat state.
Kerry tweeted congratulations to Modi on Friday after a landslide win for his Hindu nationalist Bharatiya Janata Party, saying he looked forward to "growing shared prosperity/security".
President Barack Obama telephoned Modi, a keen user of social networks, but is yet to comment in person.
He had warm words for his predecessor on Saturday, however.
As Manmohan Singh left office after 10 years in power in New Delhi, Obama called to tell him that there were "very few people in public life that I have admired or appreciated more".
Modi has displayed no rancour publi