revisiting a (forest) tile without an icon. You roll 1d6. if even you do nothing (end the day, camp for the night). On odd, you do the encounter you rolled. if you rolled a 3, you do Forest E3.
If for some reason, you've already done that event, you would do the even event below Encounter 3, in this case Encounter 4. Otherwise, nothing happens and you would end the day and camp for the night).
You shouldn't roll again after that first roll.
Hope this helps! Sorry for the delayed response!