Duncan Sim, 19, was last seen at the Madras Rugby Club in the Fife town on the evening of Wednesday March 14.
Duncan, who is a chemistry undergraduate at St Andrew’s University, has not made contact with any friends or family since leaving an event at the club around 11.15.
Police have now released a new image of Duncan discovered during CCTV examination.
He was in the St Andrews Links area between 11.24pm and 11.33pm on Wednesday 14 March.
Duncan is pictured outside Pilmour Clubhouse, near to the Eden Golf Course in St Andrews wearing a grey-coloured suit jacket, white shirt, blue and white striped tie, and brown-coloured shoes.
Inspector Karen Muirhead of Fife’s Police Division said: “We are committed to our search for Duncan and information now obtained from CCTV enquiries supports him being in the area near to the Eden Course shortly after he left Madras Rugby Club.
“He appears to be alone but it is unclear what direction he left this area in.
“I would again appeal to the public to think back to Wednesday 14 March and consider if they saw Duncan, or a man matching his description in the area. We hope that this image jogs someone’s memory and can give us that vital piece of information that we need in order to trace him.
“It has now been two-weeks since Duncan was last seen and we remain extremely concerned for his welfare. We continue to keep Duncan’s family updated with our enquiries and any developments.
“I would like to extend my thanks to the public and the media for their assistance in sharing our appeals for information, and to our partner agencies and civilian volunteers who have helped in the search for Duncan.
“I would ask anyone with information, no matter how small, that can help with our inquiries in tracing Duncan, to come forward and report this to us as soon as possible.”
Those with information are asked to contact Police Scotland via 101, quoting incident number 2987 of 15 March.