Jan Koch

Upon activation, this plugin uses the “automatic_updater_disabled” filter to prevent automatic updates from being installed. 
It does not offer configuration, not even an options page in WP Admin.
Simply install and activate the plugin to disable all automatic updates. Deactivate the plugin to re-enable all automatic updates.

Stop Automatic Updates

This plugin disables all automatic updates. No configuration needed.

gr8nilay

This plugin is use to disable all your theme updates as well as notifications for the same. It will prevent your wordpress to check for new updates for each theme. This plugin is ideal for whom who have customzied the theme and won’t loose their customization at time of update.
Read This First: 
You need to keep your WordPress updated with themes and plugins so if you fail for the same then it will might compromise security of your site.

Disable WP Theme Updates Advance

Easy to install and automatically disable all theme updates.



Nice..!!

Disable all your WordPress theme updates on plugin activation.

Stop Automatic Updates vs Disable WP Theme Updates Advance