I think this is a Maple but I did not plant it so don't know which it is. Any help?

What a pretty color!
Possibly an Amur maple, Acer ginnala ?

The leaves look like they may have chlorosis.

Thanks Greene.....it might be. Would be nice it is that color naturally and not chlorosis.....

Beautiful tree! I'm with greene... definitely looks like Amur Maple to me... and I also agree that you may have a nutrient deficiency going on. Amur Maples are particularly prone to Iron Chlorosis. That may be the cause of those yellowing leaves/green veins.

So if it were growing in your yard would you give it iron next spring or just enjoy the color?

For what it's worth, if it was in my yard I would kill it as soon as possible. Amur Maple is considered to be invasive in most of North America.

Apparently, Iron Chlorosis can be pretty difficult to correct... personally I like to try to do what I can to resolve the issue when I have a sick plant, within reason (cost-wise, time-wise, etc.). It often comes down to what you can live with and what you cannot. I am not sure about the long term effects of iron chlorosis on Maples, but it would be worth looking into. If the long term effects aren't serious and the discoloration doesn't bother you... I'd say just let it be

There are plenty resources online with useful info on the subject... Here's one for starters:

https://www.extension.purdue.e...

Hope that is helpful!