This paper defines non-profit organizations and all their work characteristics and how they provide humanitarian aid to children with developmental disabilities and their parents through their non-profit work. Also, the way of working of the Udruga Srce is described in detail, on the example of which you can see the vision, goal and purpose of the existence of such organizations that contribute to the improvement of the social community through their work. In addition to the fact that parents of children with developmental disabilities need to adapt to a new lifestyle, communication between them and professionals is also important. Health professionals should provide children and parents with all the necessary help and support. The main goal of this research was to show the way professionals from non-profit organizations work, that is how they provide support to parents of children with developmental disabilities. Also, the specific goals were: 1. show parents' satisfaction with the way of work of health professionals from non-profit organizations and 2. determine whether professionals from non-profit organizations provide enough support to parents in working with their child with developmental disabilities. The sample includes 46 parents of children with developmental disabilities up to the age of 15, in which an online questionnaire was used. The results of this work show the following: 1. most professionals from non-profit organizations use different methods of working with children with developmental disabilities and their parents, 2. most parents are satisfied with the way of work of professionals from non-profit organizations and 3. most professionals from non-profit organizations provide adequate support to children with developmental disabilities and their parents, but some parents stated that in some non-profit organizations there is no support and that they do not receive the necessary information that is important to them when working with their child.