Your point is well taken, Mr. KK! HR. Yet, here, the discussion is not about the justifiability of the rule but its application only. In general usage, the term "abscond" would mean leaving suddenly without any intimation and remaining untraceable. In the realm of employment, it is considered the most unprofessional and unethical way adopted by any employee to separate from the organization in breach of the contract of employment.
Absence from duty
Absence from duty up to a consecutive period of 3 days without intimation can be initially treated as mere unauthorized absence, which could be authorized after submission of a leave application for any eligible leave, including Leave on Loss of Pay, later on rejoining duty on the 4th day. Thus, the break in the continuity of service of the employee is averted. However, continued absence without any intimation beyond 3 days, as per the rule, enables the employer to arrive at a negative presumption of abscondment and take appropriate action.
Therefore, logically, the abscondence takes effect from the first day of such unauthorized absence only. That's why and how the absconding cases baffle the HR fraternity when they culminate in disciplinary action.