Can a cat be left alone for 3 days without any supervision or care?

No, it is not recommended to leave a cat alone for 3 days without any supervision or care. Cats require regular feeding, fresh water, and a clean litter box, as well as social interaction and monitoring for any potential health issues. Leaving a cat alone for an extended period of time can lead to stress, dehydration, hunger, and other health problems. It is best to arrange for someone to check on the cat or to board them in a reputable facility if you will be away for an extended period.