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 the new design, wherein the display screen is flat except that it is curved on the right side;
FIG. 2 is a right-side view thereof;
FIG. 3 is a front view thereof, with broken lines showing a mobile phone to illustrate environment;
FIG. 4 is a right-side view thereof, with broken lines showing a mobile phone to illustrate environment;
FIG. 5 is a rear view thereof, with broken lines showing a mobile phone to illustrate environment;
FIG. 6 is a left-side view thereof, with broken lines showing a mobile phone to illustrate environment;
FIG. 7 is a top plan view thereof, with broken lines showing a mobile phone to illustrate environment; and,
FIG. 8 is a bottom plan view thereof, with broken lines showing a mobile phone to illustrate environment.
The broken lines illustrate the display screen or portion thereof with graphical user interface form no part of the claimed design. The broken lines illustrate portions of the graphical user interface and form no part of the claimed design.