Hijjah 02, 1431, Nov 08, 2010, SPA -- Qatari Heir Apparent Sheikh Tamim bin Hamad Al Thani left Doha Monday for a three-day visit to Singapore, during which he will chair the Qatari side to the Qatar-Singapore High-Level Joint Committee meetings. During the visit, the Heir Apparent is accompanied by a high level official delegation, Qatar News Agency (QNA) reported.