you left it; you let him/her/it
Tu l'as laissé rester loin d'ici trop longtemps.
You let him stay away from here for too long.
— Crazy Rich Asians (2018)
Did you let him do it?
Did you let him go?
Ne me dis pas que tu l'as laissé dans le bus !
Don't tell me you left it on the bus!
— Central do Brasil (1998)