spectrum child

My 15 year old son gets overwhelmed with words. When I am going through the rule of three with him he often asks to disagree appropriately and asks for some time to calm down. I can see that he is trying to calm down but finds the noise overwhelming. I have left him for about 5 – 10 minutes and carried on when I come back and he calms himself down . Is this okay to do. He does not always ask calmly but I can tell that he is trying.