The ornamental design for a displayscreen or portion thereof with graphical user interface, as shown and described.
Fig. 1.1 is a front view of a display screen or portion thereof with graphical user interface according to a first embodiment of the claimed design;
Fig. 1.2 is a front view of a display screen or portion thereof with graphical user interface according to a second embodiment of the claimed design; and,
Fig. 1.3 is a front view display screen or portion thereof with graphical user interface according to a third embodiment of the claimed design.
The broken lines shown in Figs. 1.1-1.3 illustrate the display screen or portion thereof and form no part of the claimed design. The broken lines shown in Figs. 1.1-1.3 illustrate environmental structure of the display devices and form no part of the claimed design.