SUSE supports a lot of architectures and runs on everything from IBM mainframe to x86 machines, and more. With ARM’s push in the data center, it made even more sense for SUSE to work closely with ARM to support yet another platform.
When the Raspberry Pi 3 Model B was announced, SUSE engineers found that it runs on the Broadcom BCM2837 64-bit A53 ARM processor. A lot of work has already been completed on this processor for SUSE Linux Enterprise Server, so getting SLES or openSUSE to run on Raspberry Pi 3 Model B was only a matter of time.
During SUSECon 2016, SUSE announced SLES support for Raspberry Pi 3 Model B. Due to a close and somewhat complicated relationship (openSUSE is based on source code of SLES, whereas openSUSE is touted as the upstream of SLES) between SLES and openSUSE, the announcement also means that openSUSE will also be able to run on the same device.