In a spacious mixing bowl, place the well-drained pineapple pieces, mandarin orange segments, and the entire can of cherry pie filling. Gently fold the ingredients together to form a uniform fruit base.
Incorporate the sour cream into the fruit mixture, stirring gently until the cream fully envelops the fruit.
Add in the mini marshmallows, coconut flakes, and nuts if you are including them. Carefully fold these additions into the mixture, ensuring even distribution without breaking down the fruit.
Cover the bowl securely with plastic wrap and refrigerate for a minimum of 1 hour. This resting period allows the flavors to blend harmoniously.
Serve the chilled salad in individual dishes or cups. Enjoy immediately for the best texture and flavor.