Emergency services were called to Victoria Road in Balby at around 1:00am, October 29.
They had received reports that a man, believed to be in 50s, had been found unconscious and with head injuries near the Park Social Working Men's Club.
Despite the best efforts of members of the public and ambulance service staff, the man was sadly pronounced dead at the scene.
His family has been informed.
A woman, 33, and two men, 47 and 39, have been arrested on suspicion of murder and remain in police custody.
Enquiries are ongoing and officers are encouraging anyone who was in the area at the time and may have witnessed the incident to get in touch.
Anyone with information which may assist police is being asked to get in touch via their online live chat, online portal, or by calling 101. Please quote incident number 112 of 29 October when you get in touch.
Alternatively, if you prefer not to give your personal details, you can stay anonymous and pass on what you know by contacting the independent charity Crimestoppers.
Call their UK contact centre on freephone 0800 555 111 or complete a simple and secure anonymous online form.