No, Diluted EPS is not required to be disclosed by the SMC's & SME's, otherwise known as Level II & Level III Entities, respectively.
As per Accounting Standard 20, 'Earning Per Share', All Entities are required to shown on the face of P&L A/c :-
1. BEPS
2. DEPS
3. Reconciliation Statement, reconciling the two Ratios - BEPS & DEPS
But, Partial Exemption is available to SMC's & SME's in that they do not need to disclose the DEPS, and therefore the Reconciliation Statement is also not needed. They only need to disclose the BEPS.
Note :- Remember, any of the Partial Exemptions, given in AS - 15/19/20/28/29 is not mandatory to avail. It is up to the Entities to decide whether they want to avail the Exemption or not.