"Do not live in Korea."
Translation:한국에 살지 마세요.
Its not a correct sentence. To say you don't do something you would use "안", such as "저는 한국에 안 살아요." "I don't live in Korea".
But when telling someone else not to do something you would use "-지마세요". In this case you are telling someone not to live in Korea so "한국에 살지마세요" would be correct.