There is no such term as "absconding" under the labour law. This absconding/ ask to leave is hugely misrepresented/ misused in the corporate sector.
Anyways, coming to the problem, since you are on the roll of third party, the employer employee relationship exists between 3rd party and yourself, and NOT with Accenture and yourself.
If you have proper acceptance of your resignation to the 3rd party (i.e. your employer), then you have nothing much to worry. Since Accenture is the principal employer here, it neither has right to appoint you nor terminate you.