The ornamental design for a displayscreen or portion thereof with graphical user interface, as shown and described.
FIG. 1 is a front view of a display screen or portion thereof with graphical user interface showing our new design in a first embodiment;
FIG. 2 is a front view of a display screen or portion thereof with graphical user interface showing our new design in a second embodiment;
FIG. 3 is a front view of a display screen or portion thereof with graphical user interface showing our new design in a third embodiment;
FIG. 4 is a front view of a display screen or portion thereof with graphical user interface showing our new design in a fourth embodiment;
FIG. 5 is a front view of a display screen or portion thereof with graphical user interface showing our new design in a fifth embodiment;
FIG. 6 is a front view of a display screen or portion thereof with graphical user interface showing our new design in a sixth embodiment; and,
FIG. 7 is a front view of a display screen or portion thereof with graphical user interface showing our new design in a seventh embodiment.
The outermost broken lines illustrating a display screen or portion thereof form no part of the claimed design. The remainder of the broken lines illustrating portions of the graphical user interface forms no part of the claimed design.