Plans for a new industry leader in Thailand, with a market share of more than 50% of mobile subscribers, have been held up over competition concerns since they were announced in November last year.

The plan originally set a one year deadline for carrying out a voluntary tender offer that would allow the $8.6 billion merger to go ahead, but this condition was not met, Norway's Telenor said in a statement.

The Norwegian firm said it however still believed in the benefits of a deal, and that it continued to actively support an amalgamation of DTAC and CP Group's True.

"The parties aim to complete the transaction within the first quarter of 2023," it said.

(Reporting by Terje Solsvik, editing by Anna Ringstrom)