ICD-11 classes
21 Symptoms, signs or clinical findings, not elsewhere...
Mental or behavioural symptoms, signs or clinical findings
MB24 — Symptoms or signs involving mood or affect
MB24.6 — Disturbance of affect
MB24.61 — Blunted affect

ICD-11 MB24.61 — Blunted affect

A severe reduction in the expressive range and intensity of affect, but less than is observed in Flat affect.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.