Intellectual disability is characterized by a significant limitation in intellectual functioning and adaptive behaviour before the age of 18 years (American Association on Intellectual & Developmental Disabilities, 2010). The diagnosis considers disorders in conceptual, social and practical domains, according to the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5; American Psychiatric Association, 2013). More than 1,000 million people worldwide are considered to suffer some type of disability, and it has been estimated that there are 273,418 people with intellectual disability in Spain (Institute for the Elderly & Social Services, 2017; World Health Organization, 2011).An intellectual disability diagnosis can have a major impact on families, especially when unexpected (Bourke-Taylor et al., 2010;Van der Steen et al., 2016). It has been reported that parents first experience strong emotional shock, confusion, surprise, sadness, frustration, guilt and/or resentment, even denying the reality of the