King, representing Great Britain, reached the semi-finals of the men’s 60m hurdles in Birmingham.
He clocked 7.69 seconds in the heats on Saturday evening before running 7.70 in a strong semi-final on Sunday.
It was not enough to reach the final and the City of Plymouth athlete admitted he was a bit disappointed with his semi run.
“I am a little bit disappointed, I can’t lie,” he said afterwards. “I would have liked to have done a bit better and improved on my time from the heats.
“But it has been an amazing experience and I will use it as motivation for the outdoor season.”
King will make his Commonwealth Games debut in April after been selected to represent England in Australia.