Heat the olive oil in a large pot over medium heat.
Add the onion, green bell pepper, celery, and garlic. Sauté for about 5 minutes until the vegetables are tender.
Stir in the diced chicken breast and cook until browned.
Add the diced tomatoes and chicken broth to the pot.
Stir in the okra, Cajun seasoning, and thyme.
Bring the mixture to a boil, then reduce the heat and let it simmer for 30 minutes.
Stir in the shrimp and cook for an additional 5 minutes.
Season with salt and pepper to taste. Garnish with fresh parsley before serving.