The ornamental design for a displayscreen or portion thereof with graphical user interface, as shown and described.
FIG. 1 is the front view for a display screen or portion thereof with graphical user interface showing our new design; and,
FIG. 2 is the enlarged front view of the graphical user interface of FIG. 1 for clarity of disclosure.
The outermost broken line in FIG. 1 represents the display screen or portion thereof and forms no part of the claimed design. The broken lines in FIG. 1 within the display screen showing text and graphical elements represent portions of the display screen that form no part of the claimed design.