Smita was married to veteran actor and politician Raj Babbar, with whom she had Prateik. She died at the age of 31 due to childbirth complications.
Remembering his mother, Prateik took to Instagram to share her photograph and wrote: "My mother died today! 30 years ago on the 13th of December... Smita's spirit still lives on, and lives on with pride and honour and dignity."
"30 years later, Smita still manages to make an entire country miss her, be proud of who she was and what she achieved. And the wonderful things she did for people," he added.
Prateik says his mother was "God's child".
"But then the Gods got greedy and wanted to keep her for themselves. Yes, they got the better of her. She always made us so proud and will continue to make us proud and continue to inspire so many," he said.
"R.I.P. Smita Patil 1955-1986. I love her... As much as I hate her for never being there," Prateik said. "A son of a great woman! A true icon! A legend! I will make her proud! And I will not rest till I do!"
During her career, Smita featured in films like "Manthan", "Bhumika", "Aakrosh", "Chakra", "Chidambaram" and "Mirch Masala", carving her niche as an actress with a nose for parallel cinema. She was the recipient of the Padma Shri, India's fourth-highest civilian honour in 1985.
Over ten of her films were released after her death.