That's going to be very hard to save, IMO. If there are any healthy leaves left on it, I'd trim everything (branches, leaves, everything) off but those. I'd only leave a few leaves on one branch and remove the rest. The new/green branches are shriveled and look dehydrated, the root system is either very sick or already dead.
Did you put any compost or decaying matter in the soil you planted it in? Lots of wood chips in the pics, did those get mixed into the soil when you planted? What's the drainage like, does the ground hold a lot of water (doesn't look like it)? Did you bare root the tree (strip all the container soil from the roots) when you planted it?