TOKYO, Sept 17 (Reuters) - The banking arm of Sumitomo

Mitsui Financial Group ( SMFG ) has agreed to buy an additional

4.2% stake in India's Yes Bank from an affiliate of

Carlyle Group ( CG ) for 51 billion yen ($349 million), it said

on Wednesday.

Sumitomo Mitsui Banking Corporation, Japan's second largest

lender by assets, also said it had now completed its acquisition

of an initial 20% stake in the Mumbai-based bank, in a deal

first announced in May.

($1 = 146.2800 yen)