Children diagnosed with moderate autism spectrum disorder (MASD) exhibit a range of socially unacceptable behaviors, which notably include social withdrawal behavior (SWB); these individuals tend to disengage from various social contexts, consequently impeding their communication and social interaction capabilities. The primary objective of this research was to employ miniatures (diorama) as a methodological approach to construct semi-naturalistic scenarios for children with MASD that authentically represent their quotidian experiences and facilitate interaction, contributing to the alleviation of their SWB. The research sample comprised 21 children with MASD, aged between 6 and 9 years, who were enrolled at the Al-Jabr Institute in Al-Ahsa, Saudi Arabia. A quasi-experimental methodology was adopted to align with the research's inherent characteristics, using a three-group design. The instruments utilized included the Social Withdrawal Behavior Scale (SWBS) alongside a training program devised by the authors. The results showed a significant reduction in SWB among those children to whom the diorama program was applied. Results also indicated the continuation of this effect after the end of the diorama program period for two consecutive months. The outcomes encourage further implementation of the diorama methodology on more extensive samples and across a broader geographic scope within Saudi Arabia, thereby facilitating the generalization of the findings to the entire population of children diagnosed with MASD. Findings also encourage the enhancement of the diorama's role in forthcoming experimental inquiries to ascertain its efficacy in mitigating other socially maladaptive behaviors exhibited by children with MASD.