Somebody showed it a picture of an Emerald Ash Borer and it lost its will to live.
The dirt in the yard looks bone dry. Are you watering it regularly? What part of the world are you located? We've had an extremely wet year in the midwest and most of the young trees have fungus type issues, but they pull out of it quickly. Is there new growth on the tree, and do those leaves look normal? If so, I'd keep it watered and watch it closely. I'm guessing that these leaves will look bad, but the new growth will be alright and it will survive the winter, and look fine when it leafs out in the spring. Can't tell much from the pics and more info would be helpful. How long ago did you plant it? It looks a little stressed, but transplant shock and/or hot temperatures will do that. Again, keep it watered and watch it. It needs to get its roots established, have enough leaves to store up energy before winter... if it can do that it will come back in spring in fine shape.
If you're in Nevada, you're going to have to keep it watered until it gets established, that's for sure.