The man who found the animal, who asked not to be named, took it to the vets for urgent treatment – but they were unable to save its life.
He told the Free Press: “I was called to pick up a cat in distress. It had turned up on Newton Lane, Sprotborough in a terrible state. It was only when I got the cat to the Vets4Pets, Wheatley, that the snare was found and removed. But it was too late
He said it had been confirmed the item in the picture was a snare, and is concerned more animals could suffer similar injuries.
"I am guessing there will be more. If there’s one there must be,” he said.
He added it had been identified as a fox snare by the National Anti Snaring Campaign.
A snare is a trap for small animals, usually consisting of a noose which closes tight.