Following are a number of back-translations as well as a sample translation for translators of Isaiah 17:3:

• Kupsabiny: “The guarded cities in Israel shall be torn down,
  and the rulership of Syria will be destroyed.
  The people of Syria who remain/survive shall bear the consequences
  like when the Israelites were destroyed.’” (Source: Kupsabiny Back Translation)
• Newari: “The LORD Almighty says like this,
  "The fortified towns of Israel will be destroyed
  and royal power of Damascus end.
  and also, like the Israelites, the Arameans
  who are spared and still remain, will fall into shame.” (Source: Newari Back Translation)
• Hiligaynon: “The walled-stone towns of Israel will-be-ruined, and the greatness of Damascus will-disappear/gone. The end-result of the remnants those of/from-Aram will-become like to what-had-been-the-end-result of the Israelinhon. I, the LORD Almighty, (am) the-(one) saying this.” (Source: Hiligaynon Back Translation)
• English: “The cities in Israel will not have walls around them to protect them.
  The power of the kingdom of Damascus will be ended,
  and the few people who will remain in Damascus will be disgraced like the people in Israel were disgraced.’
  That is what the Commander of the armies of angels says.” (Source: Translation for Translators)