Not considering the electronic spin the degeneracy of the second excited state (n = 3) or of H-atom is 9, where the degeneracy of the third excited state of $H$  is :

For H-atom the (single electronic system), Energy order of different subshells:  

$1s<2s=2p<3s=3p=3d$
Hence in it’s 2^nd  excited state electron reaches to the shell number = 3.
While for H- ion (multielctronic system) the energy order of different subshell is  $1s<2s<2p$
Hence in it’s 2^nd excited state electron enters in 2p subshell. 
Hence degeneracy of 2p subshell of 2^nd excited state = 3