I think it is hearsay.
Yup. But finish the phrase. What's the rest of it?
Hearsay Wex Legal Dictionary Encyclopedia LII Legal Information Institute
Definition
Broadly, an out-of-court statement offered to prove the truth of whatever it asserts. Hearsay evidence is often inadmissible at trial. However, many exclusions and exceptions exist. Evidence meeting the broad definition may not actually be hearsay under the court's evidence rules. Even hearsay may be admitted if exceptions are met.