i know jyn isn't out and we should see a new rules update next week if she comes out at the end of the month as some people are saying, but question about her ability, they way it reads is:
infiltrate: you may deploy anywhere beyond range 3 of all enemy units.
so with that being said you basically can deploy anywhere on the board including the enemy deployment zone as long as its range 3 and beyond.
my question is when is this taken into account right when she deploys or after every unit is deploy you check this.