Sonic the Poster Mag #3 was the third installment of Sonic the Poster Mag, a spin-off of Sonic the Comic referred to as "A Sonic the Comic Mega-Production" and published by Fleetway Editions. It was released the week after Sonic the Comic #20, and before Sonic the Comic #21. It contains a giant poster featuring Sonic the Hedgehog in action, with a six-page comic strip on the reverse.