What:
A non-player retrieves an out-of-bounds disc and returns it to the thrower who is standing on the perimeter line

Result:
Rule 11.8 allows non-players to retrieve the disc, however the thrower must carry the disc the last 3 metres.  Therefore the thrower should walk 3 metres away from the field and then return.  They may then establish a pivot at the correct spot and continue play.

Extra:
If the thrower commences play without going 3 metres away the opposition may call violation and play will restart with a check.
However if the opposition does not feel they have been disadvantaged by the disc being returned to the thrower, they can allow play to continue.
Non-players may also stop an out-of-bounds rolling disc that is more than 3 metres from the pivot point.
The team in possession may choose to substitute a disc if the disc is out-of-bounds, and it will save time to substitute it. The thrower must still carry the disc the last 3 metres to the field.

Note:
Non-players should not intentionally touch a disc until it has become out-of-bounds.