McCartney III was recorded in early 2020 in Sussex, England at McCartney's home while in lockdown amid the COVID-19 pandemic. Describing the process of recording the album, McCartney said: "Each day I’d start recording with the instrument I wrote the song on and then gradually layer it all up; it was a lot of fun. It was about making music for yourself rather than making music that has to do a job. So, I just did stuff I fancied doing. I had no idea this would end up as an album."