Hi Radhakrishnan,
You may introduce another lifecycle state say "Revised" in the document lifecycle template.
Then change the lifecycle state of the Document A.3 to "Revised". Now as per policy, guest members can not access previous versions.
Another Alternate Option is there:
In the user preferences, there is an option to search "only the latest version". If that option is set to true, guest members if search by document number, it won't list out the previous released versions. Since the latest version is also not released, the search result will be empty.
But if the guest goes inside the folder location where documents resided, they can see all the released versions.
Regards,
Suresh Babu AD