Is Naruto: Ultimate Ninja 3 (Accel 2) on PS2 in English?

No. Naruto: Ultimate Ninja 3 (titled Naruto: Narutimate Accel 2 in Japan) was never localized. It released only in Japan (Nov 2005) on PS2.

English Options

• Ultimate Ninja 1 & 2: Localized on PS2 (NA/EU).
• Ultimate Ninja 3: Japan-only. Fan translation patch exists for ISO (requires modded PS2/OPL/PCSX2).
• Ultimate Ninja 4 / 5 / Storm series: Fully localized on PS3/PS4/PC/Xbox.
• Accel 3 (Japan) / Storm 1: First 3D arena fighter global.

To play UN3 in English: PCSX2 emulator + Fan Translation Patch (search "Naruto Ultimate Ninja 3 English patch"). Legal only with own disc dump.