Mix the ground beef, breadcrumbs, egg, 4 cloves of minced garlic, 1 teaspoon smoked paprika, salt, and black pepper in a bowl until evenly combined. Shape the mixture into 16 small meatballs.
Place the meatballs in the slow cooker. In a separate bowl, stir together the barbecue sauce, beef broth, remaining 4 cloves of minced garlic, and remaining 1 teaspoon smoked paprika. Pour the sauce over the meatballs.
Cover and cook on low for 6 hours or on high for 3 hours, until the meatballs reach an internal temperature of 160 degrees. Stir gently once or twice during cooking to coat them evenly.
Sprinkle with chopped parsley before serving.