Side 3 (2010) is a remix, demos and alternate-takes album of Circulatory System's 2009 release Signal Morning. The limited release 12" album came with the deluxe package of Signal Morning.The covers for the album were handmade and individually stencil spray-painted with the number 3, on top of the original Signal Morning album cover. The inlay has the words "Circulatory System" stenciled. It was released in various colors and variations of layout, designed by Will Cullen Hart.