Bander Yahya A Alzahran, a father of three, was on a holiday here with his family when the offences were committed at a hotel on the Sentosa resort island in August last year.
The 39-year-old, who is attached to the Saudi Arabia Embassy in Beijing, is appealing against his conviction and sentence, The Straits Times reported.
Alzahran was found guilty on Wednesday after an eight-day trial of kissing the 20-year-old on her neck and hugging her while wrongfully restraining her inside the hotel room.
District Judge Lee Poh Choo had found him "unusually convincing".
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She rejected the defence assertion that the whole incident was a set-up and that the victim conspired with other staff to level false allegations against Alzahrani to extort money from him.
The victim had been reluctant to divulge anything as she was "confused" and did not know what to do. She had said to a colleague, who had noticed the victim's distress and unusual behaviour, that the guest had told her this was a "top secret" between them.
The maximum penalty for aggravated molestation is between two and 10 years in addition to caning on each charge.
For using criminal force, the maximum penalty is three months' jail and a Singapore dollar 1,500 fine.
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