Studies link a lower level of maternal education with an increased risk of developing language and speech difficulties in children (Campbell et al., 2003; Stanton-Chapman et al., 2002). This study was therefore performed to examine whether there are differences in educational level of parents of children involved in the Department for Rehabilitation and Education of Preschool Children at the SUVAG Polyclinic and parents of children involved in regular preschool facilities. This study includes data for 207 children, residents of Zagreb, who have been involved in complex rehabilitation in the Department for Rehabilitation and Education of Preschool Children at the SUVAG Polyclinic for the previous two years and the equivalent number of children involved in 5 preschool facilities from different areas of Zagreb. The children are equal by age variable. The second aim of this study is to question the age of children with communication, speech and language disorders when being involved in diagnostic and rehabilitation process considering their previous involvement in regular preschool facility. Purpose of this study is to contribute to current knowledge about the connection between educational level of parents and speech and language difficulties and time of involvement in diagnostic and rehabilitation process considering previous involvement in regular preschool facility. Results of this study show statistically significant difference in educational level between parents of children involved in the Department for Rehabilitation and Education of Preschool Children at the SUVAG Polyclinic and parents of children involved in regular preschool facilities. Children who were previously involved in regular preschool facility begin diagnostic and rehabilitation process at the SUVAG Polyclinic at a later age in comparison to children who were previously not involved in regular preschool facility.