The Mayor of Kingstown season 2 finale was rife with transformative developments, but one actor's exit from the crime drama in season 3 hints at a big death hitting the McLuskys. The multiple final showdowns of Mayor of Kingstown season 2 included attempts on Mike’s life from the AP gang and the attack at the prison, but Milo and his subordinates’ appearance at Mariam’s house was surely the one with the biggest impact. Indeed, the shootout that forced Milo’s escape also caused Mariam’s life-threatening wound, and now news of the actor's departure hints at the worst possible outcome following her character's precarious circumstances in the season 2 finale.

https://screenrant.com/mayor-of-kingstown-dianne-wiest-exit-season-3-mariam-death/