The study focuses on Infant Mental Health data from an outpatient psychiatric clinic using the “Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood” (DC 0-3) and parental questionnaires, CBCL and ITSC. In total, 138 infants (aged 0–3) went through the diagnostic procedure. Sixty-eight per cent were diagnosed within Axis I, with regulatory disorder, disorder of affect and traumatic stress disorder being the most frequent diagnoses. In addition, 48% were classified as having a relationship disorder according to Axis II, with an additional 40% being considered to be at risk of developing a relationship disorder. The mothers’ and fathers’ ratings of their children's externalized and sensitivity problems were in agreement with the clinicians, but the ratings of internalized problems as well as relationship problems presented a more complex pattern.