Heat the skillet on medium heat and melt the butter. Add the garlic, stir, and cook until fragrant. Add the celery, bell pepper, and onion. Cook until tender (approximately 10 minutes).
Reduce the heat to low. Stir in the cream of shrimp soup, parsley, paprika, red pepper, and black pepper. Add the crawfish stir and cover with a lid. Cook for 10-15 minutes.
Top with fresh parsley, cajun seasoning, and hot sauce. Serve with rice.
Store leftovers in an airtight container in the refrigerator for up to 4 days.