He took a year-long break from social media in December 2015 but returned last month. And on New Year's Day, he posted a short video of him holding a sign saying: "New music coming Friday!"
Since then, he has been tweeting song lyrics and "÷" signs.
His first album was called +, while his second was called x.
Ed Sheeran is co-hosting the Radio 1 Breakfast Show on Friday, by which time he will have released something.
It's not certain whether that will be a full album or just one track.
Two tweets also contained what are presumably song lyrics.