Command & Conquer 3: Tiberium Wars does not have an official built-in "downgrade" feature. However, users often downgrade the game to or 1.08 because later patches (specifically 1.09) significantly altered unit balancing for multiplayer, which some players feel made certain campaign missions much more difficult.
: Steam users can use the Steam Console and SteamDB to download specific "manifests" (older versions of the game) directly from Steam's servers. Command And Conquer 3 Tiberium Wars PC Game Dow...
If you meant "download features" or general game capabilities: Command & Conquer 3: Tiberium Wars does not
If you are looking to downgrade or manage game versions, here are the common community-driven methods: Community Downgrade Methods Command And Conquer 3 Tiberium Wars PC Game Dow...