15.10 Suspension of Play
15.10.1 An umpire may temporarily suspend play in the following situations:
15.10.1.1 When, in his or her judgment, conditions justify such action.
15.10.1.3 When he/she leaves his or her position to brush the plate or to
perform other duties not directly connected with the calling of plays.
So if the conditions justify, I guess the umpire can suspend play. No outs during the suspension of play.
I guess if the umpire dusted off the plate, same thing.