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NetSuite Professionals

Is it possible to disable or remove this buttons when a condition is met?

Not natively, although it technically can be done:
<https://netsuiteprofessionals.slack.com/archives/C29HQS63G/p1667406895247939>

However there are some massive caveats. Like how it breaks NetSuite's guidelines; it's unsupported functionality; and will likely not be possible to do so in the future.
If attempted, it should definitely be done by someone who knows what they're doing and knows the implications of what they're doing

from <https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/chapter_4387172495.html|NS scripting best practices>:
&gt; :information_source: _*Important:* Custom code must not be used to access the NetSuite DOM. Developers must use SuiteScript APIs to access NetSuite UI components._