Hi Subash,
Thanks for contacting Syncfusion Support.
We have checked the reported issue "Nested itemTemplate issue in SfCarousel"in our side. We were unable to reproduce the reported issue, So could you provide the following information that will help us to provide appropriate solution on this.
-The Parent control in which the carousel is added.
-Issue reproducing sample.
-The platform reported issue gets occurred whether ios/Android/UWP.
Regards,
Rathanakumar S.