Brown the Italian sausage in a large skillet over medium heat, breaking it into crumbles as it cooks. Add the onion, carrots, and garlic and cook for 3 to 4 minutes until the onion softens.
Transfer the sausage mixture to a slow cooker. Add the chickpeas, chicken broth, diced tomatoes, rosemary, thyme, and oregano.
Stir to combine, then season with salt and black pepper. Cover and cook on low for 6 to 7 hours.
Taste and adjust seasoning if needed. Stir in the fresh parsley just before serving.