android partitions GONE need help!

[Kahwesii]

Hi,
when i was trying to install a new ROM (CM13) to my phone (xiaomi mi3). when i connected it to the computer my computer said i need to format the disk before using. After i did so, when i sideloaded the ROM i told me i was missing partitions to flash this ROM. Does anyone know how to deal with this?
Thanks for any help

 

[P.Kosunen]

Put it in fastboot mode and MiFlash factory image.

Download MIUI ROM Flashing Tool and Xiaomi Mi 3 CDMA/WCDMA Lastest Global Developer Version Fastboot File Download:
http://en.miui.com/a-234.html

Then install TWRP and CM13.