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 first embodiment of a display screen or portion thereof with graphical user interface showing our new design;
FIG. 2 is a front view of a second embodiment thereof;
FIG. 3 is a front view of a third embodiment thereof; and,
FIG. 4 is a front view of a sixth embodiment thereof.
The outer short dash-dash broken lines in FIGS. 1 to 4 illustrate a display screen or portion thereof and form no part of the claimed design. The remaining short dash-dash broken lines and text in the figures illustrate portions of the graphical user interface that form no part of the claimed design.