Cooper was up for the 'Best Actor' accolade but he says winning an award no longer matters to him following his father's death, reported Digital Spy.
"Death became very real. And very tangible. Because my father - someone who had been in my life for 36 years is just gone. I watched him dying and I was there by his bed watching him, breathing with him, and then I saw his last breath and he was gone.
The 38-year-old also said that losing his father has made him less nervous about things that he cannot control.
"My father gave me two gifts - having me and dying with me. I used to be the kid that got the shakes if I had to talk in public; now, I just don't get nervous about stuff. I can't control everything.
"I don't want to win an Oscar. It would change nothing. Nothing. The things in my life that aren't fulfilled would not be fulfilled. Career-wise, right now, it's better that I don't win one. I don't want to win. I don't.