Considering its proper name is "Sicilian Arabic" (the Arabic spoken in Sicily in the Middle ages) and is part of the Tunisian dialect, yes it is. Maltese has more Classical Arabic lexicon than does Moroccan Arabic.
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I have posted this argument before.
Maltese is like a distant dialect of middle age Arabic. This is a fact and Arabic speakers can vaugely understand some Maltese from what I've heard
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It did evolve from Maghrebi Arabic though, although it does have a significant amount of Italian influence https://en.m.wikipedia.org/wiki/Maltese_language. The people themselves aren’t Arabic though