A man remains in police custody at this time while enquiries continue. Officers have until later this evening (Sunday) to continue questioning him.
The second man and the woman have now been released without charge and face no further action.
Magistrates have granted a warrant of further detention for a man from Stroud who was arrested on suspicion of murder.
At Cheltenham Magistrates’ Court earlier today, Saturday 12 November, an additional 36 hours of detention was authorised. This will expire tomorrow evening, Sunday 13 November.
Officers had been called to an address in Chapel Street on Friday 4 November at around 4.15pm after concerns were raised by a neighbour.
The death was initially treated as being unexplained, but the results of a post-mortem examination led to a murder investigation being opened.
The body is believed to have been undiscovered for some time and detectives are still waiting for confirmation of the identity of the victim.
The Major Crime Investigation Team is keen to hear from anyone who has any relevant information which could assist.
Information can be provided to police online by completing the following form and quoting incident 310 of 4 November: https://www.gloucestershire.police.uk/contact/af/contact-us/us/a-crime-that-has-already-been-reported/
You can also call police on 101 or provide information anonymously by calling independent crime-fighting charity Crimestoppers on 0800 555 111 or online https://crimestoppers-uk.org/