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 according to a first embodiment, showing our new design;
FIG. 2 is a front view thereof according to a second embodiment;
FIG. 3 is a front view thereof according a third embodiment.
FIG. 4 is a front view thereof according to a fourth embodiment;
FIG. 5 is a front view thereof according to a fifth embodiment;
FIG. 6 is a front view thereof according to a sixth embodiment;
FIG. 7 is a front view thereof according to a seventh embodiment;
FIG. 8 is a front view thereof according to an eighth embodiment; and,
FIG. 9 is a front view thereof according to a ninth embodiment.
The outermost broken lines in the figures depict a display screen or portion thereof and form no part of the claimed design. The remainder of the broken lines in the figures depict portions of the graphical user interface that form no part of the claimed design.