Try talking to the other novices in the hall of elements then go back.

When that happened to me thats what i did, also the female darkelf conjurer novice leaves somewhere, i also did a small quest for one of the mages and went back and they were all their. sorry if that doesnt help much.

This happened to me. All I did was go back to Winterhold to do a couple things, and come back a few minutes later and everyone was there.

When this mission begins, you should actually just walk with him there. Then he should for sure be there.

Simply fast travel to another location and fast travel back to the Saathal location and they should be there now.

Make sure you actually located Saarthal on your global map before giving up and fast traveling away. Or else you might have to run all the way back here.

Hope this helps!

Gald

Simple exiting to the main menu and then reloading your save will fix it.

When takes look around the coffins he will stay behind for time then when you reach the end of the place he should come back to you saying," I was wondering when would I catch up to you, abd when you finish make sure o take the staff and the amlet fragment.

Hows about reloading the save?

Just Do Some Other Quest Then Return There I Ever Had This Kind of Troubel He Never Came When Iwaited So I Skip This Quest Playing Other Suddenly Poof He Is There My Advice Play Another Quest FIrst Then Return There If It Not Working Maybe The Whole Sarrthal Quest Crash Or Glitching So Keep Waiting

Did you try going inside the saarthel?? they might spawn after going into saarthel.

I searched the quest on TESwiki and found that that was a listed bug and fortunetly had two solutions.

■For some users, Tolfdir doesn't appear at the meeting place outside of the Saarthal entrance and cannot be found anywhere between Saarthal and The College of Winterhold. This persists after waiting several days in-game.

■Solution: Traveling back to the college, entering the Hall of the Elements, and then returning to Saarthal (do not fast travel) fixed this.

■Another solution would be to fast travel to another area (Whiterun for example) and then turn off BOTH the "Under Saarthal" quest and the "Forbidden Legend" quest. You can then fast travel back to Saarthal, and Tolfdir will be there

Hope this helps, the only other solutions the site offered were for PS3 and PC. I haven't run into this problem yet on my Xbox so I can't really give you any tips from personal experience.

Wait until the next morning, he only goes to the place during the day

Your best guesse is to reload a savefile from before you went to saarthal for the first time.

don't know much else...