TV umpire Joel Wilson's decision seemed harsh as Stokes appeared to be acting more in self-defence than trying to prevent being run out.
"I didn't put my hand there wilfully, it was purely out of human reaction to protect myself. But the decision was made, there's nothing I can do but it wasn't wilful whatsoever," Stokes was quoted as saying by the British media.
"It's one of those decisions where you can't look back and have any regrets because it's been made. You can't change what's happened. It's just a shame it came to the uproar it has," added Stokes, who is the first from England and sixth player overall to be dismissed for obstructing the field in a one-day international.
England were 141 for three and chasing 310. They ended up losing by 64 runs as Australia went 2-0 ahead in the five-match series.
England captain Eoin Morgan protested against the dismissal, leading to a heated exchange with his Australia counterpart, Steve Smith.
Stokes hoped no ill feeling would be carried over into the next match at Old Trafford on Tuesday.
"I hope (the incident) doesn't get turned into bad blood just out of that one little situation.
"But who knows, once I step over that line things might change. I hope it doesn't get blown out of proportion and takes away from the cricket side of things," he said.
(Reporting by Simon Jennings in Bengaluru; editing by Amlan Chakraborty)
