Hello! I would wait until the child is 3-years old. Developmental stuttering is common at a young age. Source: [https://pediatrics.aappublications.org/content/123/1/270.long](https://pediatrics.aappublications.org/content/123/1/270.long) *" Health professionals can reassure parents that onset is not unusual up to 3 years of age and seems to be associated with rapid growth in language development. "*