Noting that diversity is India's strength, the Prime Minister said that the Goods and Services Tax (GST) will be implemented from July 1 and this will herald a uniform tax system across the country.
Modi said he was asked a similar question in Germany earlier this week, before the United States decision was made public.
"I would put it very simply", he said. "We did not have any statement from anyone at that time", he said in an apparent reference to Trump's announcement. "I will go with the future generations".
When it came to the alleged hacking, he said there were no "Russian fingerprints".
Earlier in the day, Mr Trump's rash utterances left India stunned.
Only Syria and Nicaragua are non-participants in the 195-nation accord agreed in Paris in 2015.
The Syrian government fiercely rejected the allegations and has repeatedly denied using or even possessing chemical weapons since the country's compliance with the Chemical Weapons Convention was certified by worldwide observers in 2013.
"You have been talking at length about leaders like President Trump, Hillary Clinton, Chancellor Merkel and President Putin".
Putin also said if any aircraft had taken off from the airfield, modern control sources would have been able to spot the loading of shells with chemical agents.
Mr Trump's mention of India - a strategic partner of the US - in such unflattering terms may end up straining Indo-US ties. "It will further boost India-Russia friendship", Prime Minister Modi tweeted before leaving for France.
Meanwhile, the Centre for Science and Environment (CSE) said President Trump's decision was a "death knell" for the climate agreement.
"We first need scientific evidence and design and estimate documentation, that's why the projects will be launched in 2018", Kozhemyako said, elaborating that they would contribute to bolstering the ecology, healthcare, fish breeding, infrastructure, energy sector, tourism and foodservice industry.
The House intelligence committee says it is issuing subpoenas for Michael Flynn and Michael Cohen President Donald Trump's former national security adviser and his personal lawyer as well as their businesses as part of its investigation into Russian activities during last year's election. "Trump has sounded the death knell for the Agreement", the CSE's D.G. Sunita Narain was quoted as saying.