I am a team lead and also an early riser, I am usually the first person in the office so I am already working by the time everybody else starts rolling in. Occasionally somebody on my team will not show up near their usual start time in the mornings.
I tend not to think much of it, as traffic is variable, buses run late, snow, etc... but I think to myself after about 45 minutes from not seeing or hearing from somebody that I should probably try to reach out and contact.
Proper etiquette on the employee part is to call ahead if you are going to be more than 15 minutes late, but does that necessarily mean after that period I am in the right to call or text that person, even if I am not their direct manager?
The reason why I don't feel it is straightforward is because perhaps the late employee already called ahead to his direct manager, and the manager didn't pass the information along to me? It is not the employees fault in this case so maybe I am just being bothersome by calling? Perhaps it is just none of my business really as I am just a lead and not a direct manager?
NOTE: In the situation above the employee was at a client site with the manager, nobody told me. Not important to the question but just wanted to share in case anybody was interested.