There is no built-in security role that supports read, insert, and update permissions, but disallows delete. The reasoning here is that update is effectively as destructive as delete, since with that permission I can change every value in the row to some other value.

If this is still an important requirement, then you could create and register a custom security role that grants just the permissions you want. This requires a Java module, but the code should be straightforward. See the existing EditorRole for a good starting point.

Adam