Sunesson was born in Gothenburg, Sweden, into a golfing family. At age 15, she played golf at amateur standard. In 1986, Sunesson and her mother Stina won the Swedish Mother and Daughter Championship, played as 36-hole foursome stroke-play.[2] The same year she decided to get an insight on the tour. At the European Tour tournament Scandinavian Enterprise Open in Stockholm in July, she tried to be a volunteer caddie and was asked to stand in a line with all other candidates. When all male volunteer caddies finally had been chosen by the tournament professionals, three teen-age girls were left without a bag yet. The names of the three girls were Sunesson, Annika Sörenstam and Charlotta Sörenstam. Finally by persuading tour player Jaime Gonzalez, Brazil, he let her caddie for him.[3]
Faldo, who had recently undergone major swing surgery with coach David Leadbetter, won four majors together with Sunesson over a nine-year period. Sunesson decided to part from Faldo in 1999 to caddie for Sergio García in what was a short-lived stint of just eight tournaments before being sacked after a run of poor form culminated in García missing the cut in The Players Championship.
It was a coincidence that Sunesson and Faldo both married their respective partners on the same date in July 2001. She serves as a mental coach for Martin Kaymer.[citation needed]
Sunesson retired in 2012 to coach and advise full-time.[4][5]
