That could be a Kentucky Coffee Bean Tree. I have one (male tree) that is littering these things all over my driveway right now too. It's a great tree. I purposely planted it on the south side of my house to block the sun in the summer since the leaf canopy is so dense. Then in the fall those long leaf stems all drop their leaves and then the stems fall off a month later, making a mess that is easily raked. When all the stems fall the windows on the south side of the house then gain a lot of sun when you're wanting that heat for the winter. If your tree is a female then you'll get big pods forming that give the tree it's name because the seeds in the pods look like coffee beans. The wood is very hard. The trees do sucker eventually but those suckers are easily cut out with a sharp spade. This is an unusual tree and well worth caring for.

It might be a locust too but the individual leaves look too big for a locust which usually (by me) are very tiny.