Premature; too early to take action or make a decision — indicates that it is not yet time to conclude or decide.
再始動の発表は時期尚早だと経営陣は判断した。
Management decided that announcing the restart was premature.
データが不十分なので、結論を出すのは時期尚早だ。
The data are insufficient, so it's too early to draw conclusions.
時期尚早と言われても、準備だけは進めておこう。
Even if it's called premature, let's at least continue with the preparations.