I received an email from a recruiter at Criteo requesting a phone screen. Unfortunately, an hour and a half before our scheduled conversation, the call was abruptly canceled. I was asked whether I was available the following day or early the following week. I indicated that I was. I never heard back from the recruiter. I understood having their having been “called out of the office”. To not follow up after canceling out of the blue is both disappointing and unprofessional.