If one of your selected players in your same game parlay combo doesn't play, the legs involved in the specific event that the player is associated with will be voided while the other legs will remain pending and will be settled as normal. This also means that the odds of the bet will be adjusted accordingly.
For example, in the bet below, if Brandon Ingram were to not play, all of the legs involving the Raptors v Hornets game would be voided, while the markets from the two other games (Wizards v 76ers and Nuggets v Celtics) would remain pending.