The present application provides a display substrate, a method for fabricating the same, and a display device, belongs to the field of display technology, and can solve the problem of lowered product yield resulted from generation of gas by a transfer material in the process of forming a color filter by a laser transfer process in the related art. The display substrate of the present application includes a base substrate and a color filter and an auxiliary portion on the base substrate. The color filter and the auxiliary portion are integrally formed, and a gas hole is provided in the auxiliary portion.