yes you can. you have to request first on this site en.miui.com/unlock/and after use the MI Unlock app.
the next step is flashing TWRP see this tread en.miui.com/forum.php?mod=viewthread&tid=298586&highlight=redmi%2B3s
And finaly flash the weekly rom xiaomi.eu_multi_HM3SHM3X_6.7.14_v8-6.0