Sink Splash Guard

FIG. 1 is a bottom, front and right side perspective view of a sink splash guard, showing my new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a bottom plan view thereof; FIG. 5 is a top plan view thereof; FIG. 6 is a right side elevational view thereof; FIG. 7 is a left side elevational view thereof; FIG. 8 is an enlarged view of portion 8 in FIG. 5 ; and, FIG. 9 is an enlarged view of portion 9 in FIG. 7 . The evenly dashed broken lines illustrate features of the sink splash guard that form no part of the claimed design. The unevenly dashed broken lines define the boundaries of enlarged views and form no part of the claimed design.