  A lattice formulation of a three dimensional super Yang-Mills model with a
twisted N=4 supersymmetry is proposed. The extended supersymmetry algebra of
all eight supercharges is fully and exactly realized on the lattice with a
modified "Leibniz rule". The formulation we employ here is a three dimensional
extension of the manifestly gauge covariant method which was developed in our
previous proposal of Dirac-K\"ahler twisted N=2 super Yang-Mills on a two
dimensional lattice. The twisted N=4 supersymmetry algebra is geometrically
realized on a three dimensional lattice with link supercharges and the use of
"shifted" (anti-)commutators. A possible solution to the recent critiques on
the link formulation will be discussed.
