does the dragon rider abilty to add 3 to the die roll for meovment be counted when enslaved at either idol or temple, to negate basicly negate the effects of the enslavement

exampole

enslavement do not move until you roll a 4 -5 -6 for movement,

dragon rider rolls a 1 but then add 3 to the roll becomes a 4 and thus free from the enslavement

No, this is a "natural" roll of 4, 5, or 6. The ability adds to the movement, not the roll.