The flashpoint came at 0-1, when Rashford went down under challenge from Kyle Walker. City soon broke forward and led to Foden equalising from the inside-right position.
And Owen says Rashford could've done more to get back and help his teammates before Foden struck. He told Optus: "I thought it was correct nothing was given.
"I don't know why Marcus Rashford was trying to run across his man to start with, he wasn't even in control of the ball. Surely you've got to control the ball first and the cut across your man.
"I felt it was called spot on. And, actually, he would have been back in this position (defending for the Foden goal) to potentially cut that ball out.
"He's been lying on the ground for a minute or so. If he was back in, his position should be there, if he wasn't lying on the floor prior to that. So he might have been able to prevent that goal."