The invention discloses an array substrate, an irregularly-shaped display and a display device, and relates to the technical field of display. In the array substrate, a plurality of grid lines with unequal lengths are arranged on a display region, capacitance compensation structures are arranged on a non-display region and are in one-to-one corresponding to a part of the grid lines, each capacitance compensation structure comprises a first electrode, a second electrode and a third electrode which are arranged on a substrate, the first electrode and the second electrode form a first capacitor, the second electrode and the third electrode form a second capacitor, and a coupling capacitance value of the capacitance compensation structure is relevant to the length of the corresponding grid line. According to the technical scheme provided by the invention, the capacitance compensation structures are arranged on the non-display region of the array substrate, the coupling capacitance values of the capacitance compensation structures are relevant to the lengths of the corresponding grid lines, thus, the difference among coupling capacitance of the grid lines with different lengths on the display region is compensated, and the display image quality is improved.