https://bugzilla.redhat.com/show_bug.cgi?id=982601
--- Comment #5 from Shriramana Sharma samjnaa@gmail.com --- No you did not miss anything. I thought they would publish all stage 8 characters as part of Unicode 6.3 but apparently they chose to do a minimal release so no new Malayalam characters were added.
Next to be added (stage 8, probably Unicode 7.0):
0D01 1 MALAYALAM SIGN CANDRABINDU
and after that (stage 6):
0D5F 1 MALAYALAM LETTER ARCHAIC II
(Devanagari, Bengali, Telugu and Kannada also have proposed additions. See the pipeline, stage 7/8 chars.)