Display Screen or Portion Thereof with Graphical User Interface

FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with a graphical user interface showing our new design;

FIG. 2 is an enlarged view of the encircled portion labeled as 2 in FIG. 1 , shown separately for completeness of illustration.

FIG. 3 is a front view of a second embodiment of a display screen or portion thereof with a graphical user interface showing our new design;

FIG. 4 is an enlarged view of the encircled portion labeled as 4 in FIG. 3 , shown separately for completeness of illustration.

FIG. 5 is a front view of a third embodiment of a display screen or portion thereof with a graphical user interface showing our new design; and,

FIG. 6 is an enlarged view of the encircled portion labeled as 6 in FIG. 5 , shown separately for completeness of illustration.

The outermost dash-dot broken lines in the drawings illustrate the display screen or portion thereof and form no part of the claimed design. The dot-dot-dash broken lines encircling portions of the claimed design in FIGS. 1 , 3 and 5 that are illustrated in enlarged views in FIGS. 2 , 4 and 6 , respectively, form no part of the claimed design.