OVERSEAS commitments have denied Olivia Yu the chance of making her international debut for Hong Kong in next month's Asia-Pacific women's amateur team championship for the Queen Sirikit Cup. The former Miss Hong Kong had been pencilled in to represent the territory in the annual 12-nation event at Jakarta's Bumi Serpong Damai Golf and Country Club from May 18-20. However, the Clearwater Bay Golf and Country Club member has had to decline the opportunity. With Victoria Scott also unavailable due to work commitments, there is, with the exception of Joann Hardwick, an unfamiliar and inexperienced ring about the Hong Kong team. Hardwick will be joined by Royal Hong Kong Golf Club lady champion Tomoe Masaki and Gill Smith, both of whom are high single-figure handicappers and will be making their first appearances at senior international level. Rosemary Bryson, the non-playing amateur captain of the women's team, said: ''Although she will not be able to make it this time, I'm sure she will become an important member of future Hong Kong women's golf teams.'' Yu, who as a 19-year-old in 1979 won the Miss Hong Kong title, only took up golf three years ago. Since then she has developed into one of Hong Kong's brightest female golfing prospects. Over the past 24 months she has reduced her handicap from 40 to nine. She performed with distinction in the Hong Kong Open and China Open. women's amateur championships last month.