Thoroughly mix butter, garlic and parsley in small bowl.
Place each ear of corn on a piece of foil and generously spread on butter. Season corn with salt and pepper and tightly seal foil. Place corn in crock pot slow cooker; over lap ears, if necessary. Add enough water to come 1/4 of the way up each ear.
Cover; cook on low 4 to 5 hours or on High 2 to 2 1/2 hours, or until done.