Pulmonary Fibrosis and/or Bone Marrow Failure Syndrome, Telomere-Related, 3, also known as pulmonary fibrosis and/or bone marrow failure, telomere-related, 3, is related to dyskeratosis congenita and dyskeratosis congenita and related telomere biology disorders. An important gene associated with Pulmonary Fibrosis and/or Bone Marrow Failure Syndrome, Telomere-Related, 3 is RTEL1 (Regulator Of Telomere Elongation Helicase 1). Affiliated tissues include bone marrow and bone, and related phenotypes are decreased dlco and reduced forced vital capacity