Awde, in his second Games, suffered a recurrence of an existing knee injury and exited the competition after just two events - the 100m and the long jump.
And the 24-year-old Londoner, who also missed the 2010 Commonwealth Games through injury, admitted his frustration as his Olympic decathlon dream came to a premature end.
"It's been a rollercoaster ride," said Awde, who earlier posted a personal best time of 10.71 seconds in the 100m before pulling up in the long jump.
"After a personal best in the 100m, I'm in the greatest shape of my life. I was so ready to put on a good show and to entertain the crowd. I was ready - my knee wasn't.
"The pain is enough to make me stop. There are times when I've really gritted my teeth, the pain goes through the whole of my body.
"It's pretty severe tendonitis of the left patella tendon and probably would have ruptured if I had carried on. It's something I was struggling with coming into the competition.
"It's been the bane of my life for the past two years and flares up whenever I jump."
Awde also admitted that he doesn't know what his next step is going to be as he contemplates competing in a different event.
"Whether next year is written off, I don't know," he added.
"It depends on what medical intervention is required and whether I need surgery. I have a passion for the decathlon. If I can't do that, then I don't want to do what I may be forced to.
"Without being too arrogant, if the pain is enough to make me stop and pull out of my home Olympics, then it's too painful."