You could, but the missiles would generate debris on impact. They could also be intercepted in some circumstances. Instead if you position a bunch of "service"

You could, but the missiles would generate debris on impact. They could also be intercepted in some circumstances. Instead if you position a bunch of "service" and "maintenance" satellites that are conveniently in orbits near enemy satellites (in terms of delta-V) then basically get to prestage the entire event before war actually breaks out. There are plenty of satellites that basically spend time "near" unfriendly nations satellites. This is mostly for counter-intelligence as far as I can tell. To disable an enemy satellite quietly one theory I heard was to simply carry a can of black spray paint aboard, then use it to coat the enemy satellite when you want to disable it. Anything optical would be disabled immediately. The satellite would probably overheat because the reflective coating would be gone.