Melt butter in a large Dutch oven over medium heat. Add flour, and stir until light brown, 3 to 4 minutes. Add bell peppers, onion, and celery; cook, stirring occasionally, until softened, about 7 minutes. Add tomatoes, broth, parsley, spices, salt, and hot sauce.
Bring to a boil; reduce heat, and simmer until vegetables are soft and mixture is slightly thickened, about 30 minutes. Stir in shrimp, and cook until pink and cooked through, 3 to 5 minutes.
Sprinkle shrimp with parsley, and serve over rice.
