C.S.
I agree that 3 is very young to diagnosis these problems. That doesn't make sence. I have 5 boys, and my youngest is 3. He can't sit still, he can totally beat up his 9 year old brother, and very particular. That is how 3 yr olds are. Mine is very much a leader in many ways. But, he also is a very loving child, just very much out spoken.
Now, I do have 7 yr old who is very persnickity. I tell people he is my OCD child, but, there again, personality. Learn to work with the child. You HAVE to be consistent. This is the only way. I do have 2 ADHD children, and I am AHDH. I know all about it, and consistency is the best.