Why does carbon not form 3 pi bonds?

Why doesn't carbon form 3 $\pi$ bonds? If s-s overlap is possible between 2 carbon atoms,then it will be possible for 3 p orbitals to overlap laterally .

• Carbon in graphite does participate in three $\pi$ bonds all right. Aug 24 '18 at 12:39
• @IvanNeretin But not using all 3 p-orbitals, which seems to be what the OP wants. Aug 24 '18 at 16:16
• chemistry.stackexchange.com/questions/35002/… Aug 24 '18 at 19:09
• Possible duplicate of Bonding in diatomic C2, a carbon-carbon quadruple bond? Aug 24 '18 at 19:10
• No, this is not a duplicate. Related, maybe, but definitely not the same questions. If I have to, I will reopen this. Aug 25 '18 at 12:54