"My gratitude to the Government and people of France for their hospitality during my visit. This was a significant visit," the prime minister tweeted.
PM Modi, who arrived in Paris on the last leg of his tour, held wide-ranging talks with newly-elected French President Emmanuel Macron at the presidential Elysee Palace.
Mr Modi arrived in France from Russia, where he held talks with President Vladimir Putin and attended an international economic forum. Before Russia, he also visited Germany and Spain and held talks with the top leadership there.