Warne was suspended for one match and fined $4500 after being found guilty of three out of four charges stemming from Sunday night's fiery Melbourne derby at the MCG and his clashes with Renegades' Marlon Samuels.
The Stars captain said earlier in the day he had been harshly treated at the code of behaviour hearing and would consider an appeal.
After the penalty was handed down on Monday morning, Warne initially described it as harsh and said he would consider an appeal.
But he later backed down, saying his behaviour overstepped the mark and he would back the Stars to beat the Thunder and book a semi-final berth without him.
"I have decided to accept my penalty of a one-match ban. Let's hope the boys can win tomorrow and we can make the semi-finals," Warne tweeted.
"Thanks for support guys, sport can be emotional and at times very passionate too. I went to far in trying to stand up for the team."