The 35-year-old centre won the last of his 67 caps against Australia earlier this year, before failing to feature in departed head coach Andy Robinson's autumn Test plans.
But his play-making skills arguably remain without equal in the English game, suggesting he could spark England's forthcoming RBS 6 Nations Championship campaign if Robinson's eventual successor comes calling.
Smith said: "Catt can still do a job for England. The reason he is still one of the best centres in the game is his unbelievable enthusiasm.
"He comes to training and expects the best of himself and everyone else. He is there on the computer analysing the opposition and doesn't take any shortcuts.
"His nostrils flare when he walks across the white line on to the pitch - he is an inspirational player."