The ornamental design for a three piecefoldingcane, as shown and described.
FIG. 1 is a front perspective view of a three piece folding cane showing the new design;
FIG. 2 is a right elevation view thereof, with the left elevation view thereof being a mirror image;
FIG. 3 is a back elevation view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a front perspective view of the three piece folding cane shown in an alternative state, disclosing the internal connection elements for ease of disclosure; and,
FIG. 8 is an enlarged view of the internal connecting elements of the three piece folding cane, taken from the dash-dot dot-dash line in FIG. 7.
The evenly spaced broken lines in the drawings depict portions of the article that form no part of the claimed design.