Attempt

Iceland

Iceland - Criminal Code 1940 (2019) EN

III. chapter. Experiment and sharing.

Article 20
Anyone who has made a decision to commit an act punishable by this Act, and unequivocally demonstrated the intent in an act aimed at or intended to commit the offense, has, when the offense is not completed, been guilty about an attempt to do so.
For an attempted offense, a lower penalty may be imposed than for a committed offense. This should be done in particular, when it can be deduced from the experiment that the offender is not as dangerous and his will is not as hardened as it can be assumed that it is about people who commit such offenses.
If the interests of the offender, or the act itself, are such that the attempt could not have led to a complete offense, it may be decided that the penalty shall be waived.

Iceland - Laws on penalties for genocide, CAH, war crimes and crimes against peace 2018 EN

'' Article 8 Experiment and sharing''

Attempt or participation in offenses according to this Act is punishable according to
Art. III. section of the General Penal Code.

Rome Statute

Article 25 Individual criminal responsibility

3. In accordance with this Statute, a person shall be criminally responsible and liable for punishment for a crime within the jurisdiction of the Court if that person:

(f) Attempts to commit such a crime by taking action that commences its execution by means of a substantial step, but the crime does not occur because of circumstances independent of the person's intentions. However, a person who abandons the effort to commit the crime or otherwise prevents the completion of the crime shall not be liable for punishment under this Statute for the attempt to commit that crime if that person completely and voluntarily gave up the criminal purpose.