Is is grounds for constructive dismissal if one is suspended without the chance to voice their concerns to the boss?
1 attorney answer
There is nothing constructive about it. For the time being you aren't going to be working or getting paid so until you are reinstated you are dismissed. You should be able to file for unemployment if you think you can show you were dismissed without cause. If the employer can show that they suspended you for cause you won't be entitled to unemployment compensation.
Whether or not you are given an opportunity to have a meeting or talk to your boss about your side of the story doesn't appear to be relevant to anything unless those actions are required by an employment contract or collective bargaining agreement.