Cut the chicken into bite sizes pieces and slice the smoked sausage. Remove the shells from the shrimp and devein (you will add the shrimp at the end of the cooking time).
Cut the vegetables to the size that you want. Just remember that celery may take a little longer to cook if they are large pieces.
Add the chicken, smoked sausage, vegetables, and seasoning to the crockpot. Cook 6 to 8 hours on low heat. Stir the gumbo occasionally.
An hour before you serve the gumbo add the cleaned shrimp. The last half an hour add the cooked rice and stir in until well combined.
Serve with cornbread or your favorite bread.