I claim the ornamental design for a foldable carrying system for a vehicle, as shown and described.
FIG. 1 is a front/side perspective view of a foldable carrying system for a vehicle;
FIG. 2 is a front view of FIG. 1 thereof;
FIG. 3 is a back view of FIG. 1 thereof;
FIG. 4 is a side view of FIG. 1 thereof;
FIG. 5 is an opposite side view of FIG. 1 thereof;
FIG. 6 is a top view of FIG. 1 thereof;
FIG. 7 is a bottom view of FIG. 6 thereof; and,
FIG. 8 is a front/side perspective view of FIG. 1 thereof, shown connected to a vehicle.
The broken lines showing the vehicle of FIG. 8 are included for purposes of illustrating the carrying system in use, and form no part of the claimed invention.