Baseball Rule: Over the Fence Play with Runner on Third

Question
if a runner is on third and a pitcher pitches a ball over the fence should a base be awarded to the runner on third

Answer
Thanks for the question!

Yes, the runner is given 2 bases from the last base touched when the ball is released, and goes out of play, even in 10-U.  The runner would be awarded home in this instance.

I hope this helps answer your question, if not please reply!