The name of the rule: “switch” statements should have at least 3 “case” clauses
The MISRA-C:2012 Rule 16.6, which is the base of this sonaqube rule is named as: Every switch statement shall have at least two switch-clauses.
Two, not “Three”.
Here is a compliant example from the MISRA document:
switch ( z )
z = 2;
default: /* Compliant */
z = 0;