Every space-capable nation has the "ability" to deploy an anti-satellite weapon, it is simply a small gun with laser or other range-finding/locking systems, very simple to do.
They don't do it, because of a treaty signed way back when, including by Russia.
If Russia does deploy it, they are breaking the treaty, which then brings the world a minute or seconds closer to MAD (Mutually Assured Destruction) on the famous Doomsday Clock.