CyanogenMod team have quickly pulled the CM 10.1 M3 Galaxy S3 builds. This happened after some users reported that Milestone 3 CM 10.1 bricks Galaxy S3 devices. The CM10.1 M3 was released earlier today and became available for handful of Android devices that also included different variants of Galaxy S3. Surprisingly though, there was no announcement for availability of the update on G+ page or CyanogenMod website. The users, who updated quickly to the latest Snapshot build, started reporting the issues hence the release was pulled from the servers to avoid any further damage.
There is no word on when the updated (and fixed) build will be available for download. We can only hope that the issue gets resolved quickly and a tested build is released soon after. For those whose devices were affected, you can try installing an earlier build of the ROM. M1 and M2 appeared to be working just fine with SGS3 smartphones. So, you can download any of them both and flash it on your device.
Did the CyanogenMod 10.1 M3 brick your Galaxy S3 smartphone?