Place the beef stew meat, sliced mushrooms, diced onion, and minced garlic into the slow cooker.
Pour in the beef broth, then add the paprika, Worcestershire sauce, salt, and black pepper. Stir once to combine.
Cover and cook on low for 7 hours until the beef is tender.
Stir the sour cream into the slow cooker until the sauce is smooth.
Cook the egg noodles in a large pot of boiling water according to package directions, then drain.
Spoon the beef mixture over the cooked noodles and sprinkle with chopped parsley before serving.