Alan Brown has been missing from his home in Westfield Road, Balby, Doncaster, since October 2012.
Officers are keen to speak to anyone who may have information regarding the whereabouts of the 61-year-old man.
Alan was last seen on Wednesday 17 October 2012. He is 5ft 7ins tall, of slim build with sandy coloured hair and wears glasses..
Officers are appealing for anyone who may have information relating to Alan Brown’s whereabouts to call South Yorkshire Police on 101 or if you are deaf or hard of hearing on 18001 101 (text phone) or 07786 220 022 (SMS).