Does Telegram sync contacts from other apps?

Does Telegram take contacts from other apps on the device? I recently received a notification stating that a person I know has just joined Telegram. This person is not stored in my phone contacts and never has been. The only possible link it has is with the Facebook Messenger app, which is installed on the same device. This also happened on another device with the contact being from Viber. How is this even possible? It has caused a lot of problems because I can not identify the link, and how it happened to be connected. Any insight would be appreciated!