The subdomains in the Plesk panel can be managed through CLI by the utility subdomain. This utility can be useful for managing the sub domains such as to create, rename and delete the subdomains. It also helps to manage the domain hosting parameters and also to manage FTP user account for the subdomains. The domain hosting parameters such as log settings, SSL/TLS support, and hard disk limits can be managed by this utility. The following command is used to suspend the subdomains abc.example.com and xyz.example.com from the domain example.com
Command:
plesk bin subdomain -suspend -subdomains abc,xyz -domain example.com