No. '3 Days to Kill' is a fictional action - thriller movie, not based on a true story. It's full of exciting action sequences and a made - up plot that was created for entertainment purposes.
In '3 Days to Kill', the main character, a CIA agent, discovers he has a terminal illness. He's offered a chance at a cure if he can carry out a very dangerous mission. But he also has a daughter with whom he has a strained relationship. As he undertakes the mission, filled with action - packed chases and dangerous adversaries, he also tries to repair his relationship with his daughter. There are a lot of twists and turns as he battles his illness, the bad guys, and his own personal demons in an attempt to save his life and his family ties.
It's about a dying assassin who is offered a chance to cure his illness if he can complete one last mission in three days. He has to balance this dangerous task with his attempts to reconnect with his estranged daughter.
It's hard to say for sure. Some parts of 93 Days might be true, but it's likely that the story has been embellished or adapted for the screen. Maybe it's inspired by real-life incidents but not a completely accurate account.