Can a motion for leave to amend an amended complaint be denied?

3. Nor has Golden shown that the district court abused its discretion in denying his motion for leave to file an amended complaint. Golden's proposed additional allegations were in support of his bankruptcy claims, on which the arbitration award had preclusive effect. See Nunes v. Ashcroft, 348 F.3d 815, 818 (9th Cir. 2003) ("Futility alone can justify the denial of a motion to amend."), amended by Nunes v. Ashcroft, 375 F.3d 805 (9th Cir. 2004).