The title is self-explanatory. I'm currently in Chapter V and have obtained every sword except Ard'aenye (which is not obtainable anymore according to the wiki) and Dol Blathanna rune sword. It's just an obsession that I have regarding the swords so any opinions will help bring me some closure. I've searched for it everywhere but the only elven swords I've come across are the Ceremonial sword of Deithwen and the Elven sword of the Blue Mountains. At this point, it seems like the sword doesn't even exist. Am I really missing something ? (My Geralt is following the neutral path)

I'm not sure where you find it, but it is definitely still in the game. See Pic:

I see. This pic is from Chapter V right ?