Nam Dal-ri represented South Korea at the 2003 Asian Winter Games in the 3000 metres event, finishing 7th. Between 2002 and 2007 she had a total of 19 starts at national championships. She never became national champion, but won at the 2002 South Korean Single Distance Championships the bronze medal in the 5000 metres and at the 2003 Championships in the bronze medal in the 3000 metres.