Screening in three-dimensional QED with arbitrary fermion mass

We compute the quark-antiquark potential in three-dimensional massive quant um electrodynamics for an arbitrary fermion mass. The result indicates that screening prevails for any quark masses, contrary to the classical expecta tions, generalizing our previous result obtained for large masses. We also test the validity of several approximation schemes using a detailed numeric al analysis. The classical result is still reproduced for a small separatio n of the quarks.