Valorant does not have a feature of the Rank Decay. Your Rank will stay intact even you are away from the game. This will help the user to play as their convinced and you skip the game for days if you have a busy seclude and resume it when you have free time for it. If you stay away from the game for more than a month or 6 months then you have to play the Placement game in order to reinstate the rank back. When you complete the placement game you will back your rank level back without any rank decay.