ICD-11 classes
21 Symptoms, signs or clinical findings, not elsewhere...
Mental or behavioural symptoms, signs or clinical findings
MB26 — Symptoms or signs involving content of thought
MB26.0 — Delusion
MB26.06 — Jealous delusion

ICD-11 MB26.06 — Jealous delusion

A delusion that one's sexual partner is unfaithful.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.