"We are deeply saddened by the dramatic news on the death of well-known Indian actor Sushant Singh Rajput," ISU said in a statement.
"Mr Singh Rajput was a believer and strong supporter of STEM education and was following ISU on social media. He had even accepted an invitation to visit ISU's Central Campus in the summer of 2019, but other agenda priorities prevented him from travelling to Strasbourg."
Highlights:
- Sushant Singh Rajput was found dead at his apartment in Mumbai on Sunday.
- He was studying engineering before he made his acting debut.
- He was a philanthropist at heart.
Mr Rajput, a popular actor who acted in many successful films, had studied engineering.
Son of an engineer Krishna Kumar Singh, Mr Rajput was an alumnus (Batch of 2003, Mechanical Engineering) of prestigious Delhi Technological University.
He was pursuing Mechanical Engineering from the DTU but dropped out in his third year to pursue acting.
In the words of journalist and podcaster Mahim Pratap Singh, Sushant Rajput was a dreamer.
"The heartbreaking end of a dreamer: the 50 dreams," Mr Singh tweeted sharing Rajput's famous list of 50 things he wanted to do before dying.
In September last year, Sushant Singh Rajput had shared handwritten notes of the dreams he wanted to fulfil.

Bollywood actor Sushant Singh posses for a picture during launch of his film Raabta in Mumbai, India, Monday, April 17, 2017. Source: AP Photo/Rafiq Maqbool
"I love computer gaming and always wanted to learn the language behind it. So last few weeks I’ve been trying to learn coding and it has been an extremely exciting process to say the least and yet I’m just scratching the surface," he had posted on instagram.
The list included learning to fly a plane and learn morse code.
Famous for his philanthropic activities, Rajput was involved with many educational and humanitarian actions.
He wanted to teach women self-defence techniques, work for free education and teach dance to kids and help them prepare for defence force, according to the notes he had shared on social media.
He achieved some of his dreams, such as visiting CERN, the European Organization for Nuclear Research, one of the world's largest and most respected centres for scientific research.

An ambulance carrying the body of Bollywood actor Sushant Singh Rajput leaves from the building he lived in Mumbai, India, Sunday, June 14, 2020. Source: AP Photo/Rafiq Maqbool
He had posted a video of this visit on twitter saying, "A big thanks to CERN for being so welcoming and making my dream come true."
Rajput allegedly committed suicide, and Mumbai Police is investigating the matter.
The news of Mr Rajput's death came as a shock to his fans.
Indian Prime Minister Narendra Modi expressed his grief over the death of Mr Rajput saying "a bright young actor gone too soon."
"His rise in the world of entertainment inspired many, and he leaves behind several memorable performances," Mr Modi tweeted.
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