Two decisions, depending on what exactly you want to execute.
Since I'm not sure - maybe my English - so I give you two solutions.
BLOCK PACKAGE FROM UPDATE
As an example, I use Sublinter.
Preferences> Package Settings> Package Control> Settings - User
... and add something like this to block the package:
// Packages to not auto upgrade
"auto_upgrade_ignore": [
"SublimeLinter"
],
BLOCK SUBJECT FROM UPDATE
If you want Sublime to stop updating and you don’t trust application update blocking solutions, just use Nuke.
On Windows (the system I'm using) go to:
C: \ Windows \ System32 \ drivers \ etc
... and open the file with the name "hosts".
You may need to move this file to the desktop, edit it, and move it back to its original location, since Windows may not allow any changes to it - even if you try as an administrator.
Then add this line of code to the hosts file:
127.0.0.1 localhost www.sublimetext.com
127.0.0.1 localhost sublimetext.com
The version with “www” will do as sublime sends updates from the location “www.sublimetext.com”.
The above code will prevent any connection of your device to "www.sublimetext.com", therefore there are no more updates.
This does not apply to packages; they need option # 1.