Make sure you aren't spending too much time trying to get her to stop because that just feeds into the tears. Once mom is gone if child starts just point to the designated spot and say "stop or go". Then walk away. If she stops fine just go on about the day. If she doesn't stop then physically take her to the spot and say "stop or stay. When you are done come and play with us." and then walk away.
This is beyond a traumatized forlorn child that needs to be comforted and in the realm of tantrum.