The ISRD3 dataset is now finalized and freely available for researchers at the Harvard Dataverse. The reference for citation and access link:

Enzmann, D., Marshall, I. H., Hough, M., Killias, M., Kivivuori, J., & Steketee, M. (2024). ISRD3 Data: Dataset of the Third International Self-Report Delinquency Study. Harvard Dataverse, V1.
https://doi.org/doi:10.7910/DVN/EBC78E