COMMANDO 3 is the story of a secret agent in a race against time to save his country. In Mumbai, two young kids â€“ Usman and Omar â€“ are arrested along with their mentor, Subhan after a tip-off. It is revealed that Umar and Omar's real names were Rakesh and Amit respectively and they converted to Islam after watching provocative propaganda videos of Buraq Ansari (Gulshan Devaiah). Buraq is someone with no record and even his face is covered in his videos.
Hence, the Indian intelligence is unaware about his identity and name. Realizing that he's planning a major terrorist attack in India and that the festival period is coming up, the senior intelligence official Roy (Rajesh Tailang) asks his most trusted and brave officer, Karanveer Singh Dogra (Vidyut Jammwal), to handle the case. Karanveer finds out that the video and currency notes found in the houses of Usman, Omar and Subhan were sourced from London. Roy meanwhile realizes that Subhan talked about 9/11 attack repeatedly and it means that the attack in India will take place on November 9 or 9/11 in other words and incidentally, it's the day of Diwali.
With only 33 days to go for Diwali, Karanveer is urgently sent to London to track down Buraq. He's helped in this mission by Bhavana Reddy (Adah Sharma) who is now no longer corrupt but still in love with Karanveer. In London, they are provided local help by two British Intelligence agents, Mallika Sood (Angira Dhar) and Armaan Akhtar (Sumeet Thakur). After carefully going through a lot of suspects, the foursome finally manage to find out Buraq's identity and also that he runs a restaurant.
Not just that, they also discover that he is divorced from his wife, Zahira (Feryna Wazheir) and that he loves his son Abeer (Atharva Vishwakarma) immensely. Karanveer hence goes after his son and takes him in his custody, along with Zahira, who is aware of Buraq's activities and hence agrees to be a witness. Buraq is so enraged by these turn of events that he decides to advance the date of attack to catch the Indians unawares. What happens next forms the rest of the film.