But the heavy security -- from both US Secret Service and Cambodian officials -- frustrated many visitors.
"I really wanted to see him but security officials did not allow me to go closer to him," said 78-year-old Buddhist monk Sim Son.
The popular former president has already visited India, Thailand, Indonesia and Papua New Guinea as part of his Asian tour as special UN envoy for tsunami recovery and as head of his own Clinton Foundation.
Clinton was scheduled to visit a hospital for children in Siem Reap later in the day before travelling to Vietnam.