Zaar finished second in the points league last year and was a strong contributor to Rögle reaching the Swedish Championship final, where there was a loss against Växjö in the end.
After the successful season, the 27-year-old left the SHL for games in the KHL and Nizhny Novgorod.
However, the Russian team has already finished playing this season when they missed the playoffs, which means that Zaar has now become available on the market.
"I think everyone knows what he has contributed here over the years and what he can contribute to our game.
We look forward to working with him again in the pursuit of our goals ", says Rögle's sports director Chris Abbott in a press release.
The contract with Rögle extends the season, states Ängelholmsklubben.