To turn off a single event in Roblox, you usually disconnect the event connection in your script or gate it with a boolean. For Roblox notification events, you can also turn off Roblox Community Events in your app settings.

In Roblox Studio

If you mean a script event, store the connection and disconnect it when you want it off. Roblox’s docs say Connect() returns a connection object, and you can stop future calls by using Disconnect() on that object.

Example:

lua

local connection
connection = RemoteEvent.OnServerEvent:Connect(function()
    -- code here
end)

-- later
connection:Disconnect()

Temporary off switch

If you want the event to stay there but not run, use a flag:

lua

local enabled = false

RemoteEvent.OnServerEvent:Connect(function()
    if not enabled then return end
    -- code here
end)

That keeps the event connected but prevents the code from running until you flip the flag back on.

Roblox app notifications

If you meant the Roblox Community Event notifications on mobile, open the Roblox app, go to Settings > Notifications > Mobile Push Notifications, then toggle off Roblox Community Events.

Quick note

If you meant a different kind of “single event” in Roblox, the exact fix depends on whether it’s a script event, a GUI event, or a notification setting.