If you completed ARD, then the answer to your question is no. Successful completion of ARD results in a withdrawal of the charge. "Adjudication" as it is used on the registration statutes typically refers to the juvenile process; final judgments in trials of juvenile offenses are called adjudications rather than convictions.
This answer is based on general legal principles only and is not intended to provide specific legal advice. This answer is for informational purposes only and does not constitute the formation of a lawyer-client relationship. Any reader of this answer should not make decisions based upon in without first directly consulting with an attorney in person.
ARD is a form of adjudication. An adjudication refers to how a case was resolved. It includes guilty pleas, convictions at trial, withdraw or dismissal of charges, or completion of ARD. When it comes to SORNA and Megan's Law, only a conviction or a juvenile adjudication of delinquency triggers the requirement that one register as a sex offender.