Brand new fawn found laying in dirt road!! Mother no where to be found.?

My husband found a very young fawn laying in a dirt road behind his shop at work. It didn't appear to be injured & didn't move when he approached it. He brought it in & put in a box & called me. I called a game ranger & came & verified that no legs were broken etc. The ranger instructed us to put it back where he found it & see if its still there in the morning. If it is then call him back. We put it in the grass about ten feet from the road we found it in. I wish he hadn't touched it because I've heard the Mother may not take to it again if you do. Do Mother deer leave their fawns out in the open like that normally?